74697561 has 12 divisors (see below), whose sum is σ = 110813092. Its totient is φ = 48452256.

The previous prime is 74697559. The next prime is 74697577. The reversal of 74697561 is 16579647.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67963536 + 6734025 = 8244^2 + 2595^2 .

It is not a de Polignac number, because 74697561 - 2¹ = 74697559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74697551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111826 + ... + 112491.

Almost surely, 2^74697561 is an apocalyptic number.

It is an amenable number.

74697561 is a deficient number, since it is larger than the sum of its proper divisors (36115531).

74697561 is a wasteful number, since it uses less digits than its factorization.

74697561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224360 (or 224357 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 74697561 is about 8642.7750751712. The cubic root of 74697561 is about 421.1487091328.

The spelling of 74697561 in words is "seventy-four million, six hundred ninety-seven thousand, five hundred sixty-one".