725172525 has 144 divisors (see below), whose sum is σ = 1705367040. Its totient is φ = 285379200.

The previous prime is 725172523. The next prime is 725172527. The reversal of 725172525 is 525271527.

It is an interprime number because it is at equal distance from previous prime (725172523) and next prime (725172527).

It is not a de Polignac number, because 725172525 - 2¹ = 725172523 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 725172525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725172523) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 328074 + ... + 330276.

Almost surely, 2^725172525 is an apocalyptic number.

725172525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

725172525 is an abundant number, since it is smaller than the sum of its proper divisors (980194515).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725172525 is a wasteful number, since it uses less digits than its factorization.

725172525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256 (or 2248 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 725172525 is about 26929.0275539240. The cubic root of 725172525 is about 898.4221427646.

The spelling of 725172525 in words is "seven hundred twenty-five million, one hundred seventy-two thousand, five hundred twenty-five".