74604561 has 4 divisors (see below), whose sum is σ = 99472752. Its totient is φ = 49736372.

The previous prime is 74604553. The next prime is 74604587. The reversal of 74604561 is 16540647.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16540647 = 3 ⋅5513549.

It is a cyclic number.

It is not a de Polignac number, because 74604561 - 2³ = 74604553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74604511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12434091 + ... + 12434096.

It is an arithmetic number, because the mean of its divisors is an integer number (24868188).

Almost surely, 2^74604561 is an apocalyptic number.

It is an amenable number.

74604561 is a deficient number, since it is larger than the sum of its proper divisors (24868191).

74604561 is a wasteful number, since it uses less digits than its factorization.

74604561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24868190.

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

The square root of 74604561 is about 8637.3931831311. The cubic root of 74604561 is about 420.9738569458.

It can be divided in two parts, 7460 and 4561, that added together give a palindrome (12021).

The spelling of 74604561 in words is "seventy-four million, six hundred four thousand, five hundred sixty-one".