74720925 has 36 divisors (see below), whose sum is σ = 134387604. Its totient is φ = 39686400.

The previous prime is 74720903. The next prime is 74720941. The reversal of 74720925 is 52902747.

It can be written as a sum of positive squares in 6 ways, for example, as 12089529 + 62631396 = 3477^2 + 7914^2 .

It is not a de Polignac number, because 74720925 - 2⁹ = 74720413 is a prime.

It is a super-3 number, since 3×74720925³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74720925.

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 35 ways as a sum of consecutive naturals, for example, 69895 + ... + 70955.

It is an arithmetic number, because the mean of its divisors is an integer number (3732989).

Almost surely, 2^74720925 is an apocalyptic number.

74720925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

74720925 is a deficient number, since it is larger than the sum of its proper divisors (59666679).

74720925 is a wasteful number, since it uses less digits than its factorization.

74720925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 74720925 is about 8644.1266186932. The cubic root of 74720925 is about 421.1926137021.

The spelling of 74720925 in words is "seventy-four million, seven hundred twenty thousand, nine hundred twenty-five".