74252690 has 16 divisors (see below), whose sum is σ = 133883928. Its totient is φ = 29650176.

The previous prime is 74252687. The next prime is 74252693. The reversal of 74252690 is 9625247.

It is a Cunningham number, because it is equal to 8617²+1.

It is an interprime number because it is at equal distance from previous prime (74252687) and next prime (74252693).

It can be written as a sum of positive squares in 4 ways, for example, as 26739241 + 47513449 = 5171^2 + 6893^2 .

It is a super-2 number, since 2×74252690² = 11026923944472200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74252690.

It is not an unprimeable number, because it can be changed into a prime (74252693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 12186.

Almost surely, 2^74252690 is an apocalyptic number.

74252690 is a deficient number, since it is larger than the sum of its proper divisors (59631238).

74252690 is a wasteful number, since it uses less digits than its factorization.

74252690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12733.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 74252690 is about 8617.0000580248. Note that the first 4 decimals coincide. The cubic root of 74252690 is about 420.3109752850.

The spelling of 74252690 in words is "seventy-four million, two hundred fifty-two thousand, six hundred ninety".