74040525 has 72 divisors (see below), whose sum is σ = 151318440. Its totient is φ = 34283520.

The previous prime is 74040517. The next prime is 74040563. The reversal of 74040525 is 52504047.

74040525 = 1675² + 1676² + ... + 1700².

It can be written as a sum of positive squares in 12 ways, for example, as 33246756 + 40793769 = 5766^2 + 6387^2 .

It is not a de Polignac number, because 74040525 - 2³ = 74040517 is a prime.

It is a Curzon 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 71 ways as a sum of consecutive naturals, for example, 48981 + ... + 50469.

It is an arithmetic number, because the mean of its divisors is an integer number (2101645).

Almost surely, 2^74040525 is an apocalyptic number.

74040525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

74040525 is an abundant number, since it is smaller than the sum of its proper divisors (77277915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74040525 is a wasteful number, since it uses less digits than its factorization.

74040525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 74040525 is about 8604.6804124267. The cubic root of 74040525 is about 419.9102699468.

The spelling of 74040525 in words is "seventy-four million, forty thousand, five hundred twenty-five".