Number of the day: 747250

Properties of the number 747250:

747250 = 2 × 5³ × 7² × 61 is the 687217^th composite number and is not squarefree.
747250 has 4 distinct prime factors, 48 divisors, 27 antidivisors and 252000 totatives.
747250 has a semiprime digit sum 25 in base 10.
747250 is the sum of 2 positive triangular numbers.
747250 is the difference of 2 positive pentagonal numbers in 13 ways.
747250 is the difference of 2 positive pentagonal pyramidal numbers in 1 way.
747250 = 455² + 735² = 77² + 861² = 315² + 805² = 231² + 833² is the sum of 2 positive squares in 4 ways.
747250 = 95² + 132² + 849² is the sum of 3 positive squares.
747250² = 333200² + 668850² = 134750² + 735000² = 335160² + 667870² = 507150² + 548800² = 132594² + 735392² = 76440² + 743330² = 384846² + 640528² = 448350² + 597800² = 209230² + 717360² = 263032² + 699426² is the sum of 2 positive squares in 10 ways.
747250² is the sum of 3 positive squares.
747250 is a proper divisor of 1451³⁰ - 1.
747250 is palindromic in (at least) base -96.

The number 747250 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.
A201236: Number of ways to place 2 non-attacking wazirs on an n X n toroidal board.