74904225 has 24 divisors (see below), whose sum is σ = 135101472. Its totient is φ = 36316800.

The previous prime is 74904223. The next prime is 74904233. The reversal of 74904225 is 52240947.

It is not a de Polignac number, because 74904225 - 2¹ = 74904223 is a prime.

It is a super-2 number, since 2×74904225² = 11221285845701250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (74904223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44572 + ... + 46221.

It is an arithmetic number, because the mean of its divisors is an integer number (5629228).

Almost surely, 2^74904225 is an apocalyptic number.

74904225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

74904225 is a deficient number, since it is larger than the sum of its proper divisors (60197247).

74904225 is a wasteful number, since it uses less digits than its factorization.

74904225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90817 (or 90812 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 74904225 is about 8654.7226991972. The cubic root of 74904225 is about 421.5367455993.

Subtracting from 74904225 its reverse (52240947), we obtain a triangular number (22663278 = T₆₇₃₂).

The spelling of 74904225 in words is "seventy-four million, nine hundred four thousand, two hundred twenty-five".