74289561 has 8 divisors (see below), whose sum is σ = 102468480. Its totient is φ = 47818512.

The previous prime is 74289559. The next prime is 74289571. The reversal of 74289561 is 16598247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74289561 - 2¹ = 74289559 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (74289511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 426865 + ... + 427038.

It is an arithmetic number, because the mean of its divisors is an integer number (12808560).

Almost surely, 2^74289561 is an apocalyptic number.

It is an amenable number.

74289561 is a deficient number, since it is larger than the sum of its proper divisors (28178919).

74289561 is a wasteful number, since it uses less digits than its factorization.

74289561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853935.

The product of its digits is 120960, while the sum is 42.

The square root of 74289561 is about 8619.1392261641. The cubic root of 74289561 is about 420.3805338045.

The spelling of 74289561 in words is "seventy-four million, two hundred eighty-nine thousand, five hundred sixty-one".