Number of the day: 399301

Properties of the number 399301:

399301 = 7² × 29 × 281 is the 365494^th composite number and is not squarefree.
399301 has 3 distinct prime factors, 12 divisors, 19 antidivisors and 329280 totatives.
399301 has a semiprime digit sum 25 in base 10.
Reversing the decimal digits of 399301 results in a prime.
399301 = 199651² - 199650² = 28525² - 28518² = 6899² - 6870² = 4099² - 4050² = 1085² - 882² = 851² - 570² is the difference of 2 nonnegative squares in 6 ways.
399301 is the sum of 2 positive triangular numbers.
399301 is the difference of 2 positive pentagonal numbers in 5 ways.
399301 = 399² + 490² = 49² + 630² is the sum of 2 positive squares in 2 ways.
399301 = 81² + 104² + 618² is the sum of 3 positive squares.
399301² = 227360² + 328251² = 80899² + 391020² = 61740² + 394499² = 275380² + 289149² is the sum of 2 positive squares in 4 ways.
399301² is the sum of 3 positive squares.
399301 is a proper divisor of 181¹⁴ - 1.
399301 = '39' + '9301' is the concatenation of 2 semiprime numbers.
399301 is palindromic in (at least) base -85.

The number 399301 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.
A230759: Values of x such that x^2 + y^2 = 53^n with x and y coprime and 0 < x < y.