74909025 has 27 divisors (see below), whose sum is σ = 134403321. Its totient is φ = 39882240.

The previous prime is 74908969. The next prime is 74909027. The reversal of 74909025 is 52090947.

The square root of 74909025 is 8655.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21150801 + 53758224 = 4599^2 + 7332^2 .

It is not a de Polignac number, because 74909025 - 2⁹ = 74908513 is a prime.

It is a super-2 number, since 2×74909025² = 11222724052901250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74909027) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 129537 + ... + 130113.

Almost surely, 2^74909025 is an apocalyptic number.

74909025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

74909025 is the 8655-th square number.

74909025 is the 4328-th centered octagonal number.

It is an amenable number.

74909025 is a deficient number, since it is larger than the sum of its proper divisors (59494296).

74909025 is an equidigital number, since it uses as much as digits as its factorization.

74909025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The cubic root of 74909025 is about 421.5457496894.

Multiplying 74909025 by its sum of digits (36), we get a square (2696724900 = 51930²).

The spelling of 74909025 in words is "seventy-four million, nine hundred nine thousand, twenty-five".