7940725 has 24 divisors (see below), whose sum is σ = 10827432. Its totient is φ = 5740800.

The previous prime is 7940719. The next prime is 7940747. The reversal of 7940725 is 5270497.

It can be written as a sum of positive squares in 12 ways, for example, as 3352561 + 4588164 = 1831^2 + 2142^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7940725 is a prime.

It is a super-2 number, since 2×7940725² = 126110227051250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16995 + ... + 17455.

It is an arithmetic number, because the mean of its divisors is an integer number (451143).

Almost surely, 2^7940725 is an apocalyptic number.

It is an amenable number.

7940725 is a deficient number, since it is larger than the sum of its proper divisors (2886707).

7940725 is a wasteful number, since it uses less digits than its factorization.

7940725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 7940725 is about 2817.9292042207. The cubic root of 7940725 is about 199.5048166457.

It can be divided in two parts, 79 and 40725, that added together give a palindrome (40804).

The spelling of 7940725 in words is "seven million, nine hundred forty thousand, seven hundred twenty-five".