749390625 has 63 divisors (see below), whose sum is σ = 1371837909. Its totient is φ = 394200000.

The previous prime is 749390581. The next prime is 749390671. The reversal of 749390625 is 526093947.

It is a happy number.

The square root of 749390625 is 27375.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 657460881 + 91929744 = 25641^2 + 9588^2 .

It is not a de Polignac number, because 749390625 - 2²⁵ = 715836193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 10265589 + ... + 10265661.

Almost surely, 2^749390625 is an apocalyptic number.

749390625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

749390625 is the 27375-th square number.

749390625 is the 13688-th centered octagonal number.

It is an amenable number.

749390625 is a deficient number, since it is larger than the sum of its proper divisors (622447284).

749390625 is an frugal number, since it uses more digits than its factorization.

749390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The cubic root of 749390625 is about 908.3141613288.

The spelling of 749390625 in words is "seven hundred forty-nine million, three hundred ninety thousand, six hundred twenty-five".