74811421 has 4 divisors (see below), whose sum is σ = 74918844. Its totient is φ = 74704000.

The previous prime is 74811419. The next prime is 74811427. The reversal of 74811421 is 12411847.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57547396 + 17264025 = 7586^2 + 4155^2 .

It is a cyclic number.

It is not a de Polignac number, because 74811421 - 2¹ = 74811419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74811421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74811427) 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, 52660 + ... + 54061.

It is an arithmetic number, because the mean of its divisors is an integer number (18729711).

Almost surely, 2^74811421 is an apocalyptic number.

It is an amenable number.

74811421 is a deficient number, since it is larger than the sum of its proper divisors (107423).

74811421 is a wasteful number, since it uses less digits than its factorization.

74811421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107422.

The product of its digits is 1792, while the sum is 28.

The square root of 74811421 is about 8649.3595716677. The cubic root of 74811421 is about 421.3625833562.

The spelling of 74811421 in words is "seventy-four million, eight hundred eleven thousand, four hundred twenty-one".