72310725 has 36 divisors (see below), whose sum is σ = 134324736. Its totient is φ = 38562480.

The previous prime is 72310723. The next prime is 72310727. The reversal of 72310725 is 52701327.

72310725 = 1178² + 1179² + ... + 1227².

It is an interprime number because it is at equal distance from previous prime (72310723) and next prime (72310727).

It is not a de Polignac number, because 72310725 - 2¹ = 72310723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72310723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124 + ... + 12026.

Almost surely, 2^72310725 is an apocalyptic number.

72310725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72310725 is a deficient number, since it is larger than the sum of its proper divisors (62014011).

72310725 is a wasteful number, since it uses less digits than its factorization.

72310725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11928 (or 11911 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 72310725 is about 8503.5713085738. The cubic root of 72310725 is about 416.6143632125.

The spelling of 72310725 in words is "seventy-two million, three hundred ten thousand, seven hundred twenty-five".