725645925 has 96 divisors (see below), whose sum is σ = 1382054400. Its totient is φ = 373063680.

The previous prime is 725645909. The next prime is 725645927. The reversal of 725645925 is 529546527.

725645925 is a `hidden beast` number, since 7 + 2 + 56 + 4 + 592 + 5 = 666.

It is not a de Polignac number, because 725645925 - 2⁴ = 725645909 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725645927) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2823397 + ... + 2823653.

It is an arithmetic number, because the mean of its divisors is an integer number (14396400).

Almost surely, 2^725645925 is an apocalyptic number.

725645925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

725645925 is a deficient number, since it is larger than the sum of its proper divisors (656408475).

725645925 is a wasteful number, since it uses less digits than its factorization.

725645925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 401 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 725645925 is about 26937.8158914193. The cubic root of 725645925 is about 898.6175999428.

The spelling of 725645925 in words is "seven hundred twenty-five million, six hundred forty-five thousand, nine hundred twenty-five".