74055521 has 4 divisors (see below), whose sum is σ = 77953200. Its totient is φ = 70157844.

The previous prime is 74055491. The next prime is 74055529. The reversal of 74055521 is 12555047.

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.

It is a cyclic number.

It is not a de Polignac number, because 74055521 - 2¹⁴ = 74039137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74055529) 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, 1948811 + ... + 1948848.

It is an arithmetic number, because the mean of its divisors is an integer number (19488300).

Almost surely, 2^74055521 is an apocalyptic number.

It is an amenable number.

74055521 is a deficient number, since it is larger than the sum of its proper divisors (3897679).

74055521 is a wasteful number, since it uses less digits than its factorization.

74055521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897678.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 74055521 is about 8605.5517545361. The cubic root of 74055521 is about 419.9386172577.

The spelling of 74055521 in words is "seventy-four million, fifty-five thousand, five hundred twenty-one".