74927421 has 6 divisors (see below), whose sum is σ = 108228510. Its totient is φ = 49951608.

The previous prime is 74927407. The next prime is 74927429. The reversal of 74927421 is 12472947.

It can be written as a sum of positive squares in only one way, i.e., 46090521 + 28836900 = 6789^2 + 5370^2 .

It is not a de Polignac number, because 74927421 - 2⁶ = 74927357 is a prime.

It is a super-2 number, since 2×74927421² = 11228236835422482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74927429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4162626 + ... + 4162643.

It is an arithmetic number, because the mean of its divisors is an integer number (18038085).

Almost surely, 2^74927421 is an apocalyptic number.

It is an amenable number.

74927421 is a deficient number, since it is larger than the sum of its proper divisors (33301089).

74927421 is a wasteful number, since it uses less digits than its factorization.

74927421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325275 (or 8325272 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 74927421 is about 8656.0626730633. The cubic root of 74927421 is about 421.5802543030.

The spelling of 74927421 in words is "seventy-four million, nine hundred twenty-seven thousand, four hundred twenty-one".