Number of the day: 354515

Properties of the number 354515:

354515 = 5 × 7² × 1447 is the 324176^th composite number and is not squarefree.
354515 has 3 distinct prime factors, 12 divisors, 17 antidivisors and 242928 totatives.
354515 has a prime digit sum 23 in base 10.
Reversing the decimal digits of 354515 results in a sphenic number.
354515 = 177258² - 177257² = 35454² - 35449² = 25326² - 25319² = 5082² - 5047² = 3642² - 3593² = 846² - 601² is the difference of 2 nonnegative squares in 6 ways.
354515 is the difference of 2 positive pentagonal numbers in 6 ways.
354515 = 29² + 45² + 593² is the sum of 3 positive squares.
354515² = 212709² + 283612² is the sum of 2 positive squares in 1 way.
354515² is the sum of 3 positive squares.
354515 is a proper divisor of 743⁸⁴ - 1.
354515 = '3545' + '15' is the concatenation of 2 semiprime numbers.
354515 is palindromic in (at least) base -94.

The number 354515 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequences (among others):

Sequence numbers and descriptions below are taken from OEIS.
A224670: Number of (n+1) X 3 0..2 matrices with each 2 X 2 subblock idempotent
A278544: Arithmetic derivative of the prime-factorization representation of the n-th Stern polynomial: a(n) = A003415(A260443(n)).