7640725 has 12 divisors (see below), whose sum is σ = 9781120. Its totient is φ = 5914800.

The previous prime is 7640723. The next prime is 7640749. The reversal of 7640725 is 5270467.

It is not a de Polignac number, because 7640725 - 2¹ = 7640723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4155 + ... + 5704.

Almost surely, 2^7640725 is an apocalyptic number.

It is an amenable number.

7640725 is a deficient number, since it is larger than the sum of its proper divisors (2140395).

7640725 is a wasteful number, since it uses less digits than its factorization.

7640725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900 (or 9895 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 7640725 is about 2764.1861370031. The cubic root of 7640725 is about 196.9600698959.

The spelling of 7640725 in words is "seven million, six hundred forty thousand, seven hundred twenty-five".