Number of the day: 249411

Martin Gardner was born on this day 103 years ago.

Properties of the number 249411:

249411 = 3 × 83137 is semiprime and squarefree.
249411 has 2 distinct prime factors, 4 divisors, 7 antidivisors and 166272 totatives.
249411 has a semiprime digit sum 21 in base 10.
249411 has a Fibonacci digit sum 21 in base 10.
249411 has a triangular digit sum 21 in base 10.
Reversing the decimal digits of 249411 results in a sphenic number.
249411 = 124706² - 124705² = 41570² - 41567² is the difference of 2 nonnegative squares in 2 ways.
249411 is the sum of 2 positive triangular numbers.
249411 is the difference of 2 positive pentagonal numbers in 1 way.
249411 = 1² + 49² + 497² is the sum of 3 positive squares.
249411² = 30525² + 247536² is the sum of 2 positive squares in 1 way.
249411² is the sum of 3 positive squares.
249411 is a proper divisor of 1669⁴³³ - 1.
249411 = '2' + '49411' is the concatenation of 2 prime numbers.
249411 = '249' + '411' is the concatenation of 2 semiprime numbers.
249411 is an emirpimes in (at least) the following bases: 2, 3, 15, 20, 21, 23, 27, 28, 33, 37, 39, 40, 42, 48, 51, 59, 63, 65, 67, 74, 75, 81, 84, and 87.
249411 is palindromic in (at least) base -94.