74721461 has 2 divisors, whose sum is σ = 74721462. Its totient is φ = 74721460.

The previous prime is 74721431. The next prime is 74721529. The reversal of 74721461 is 16412747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60357361 + 14364100 = 7769^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 74721461 - 2⁶ = 74721397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74721431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37360730 + 37360731.

It is an arithmetic number, because the mean of its divisors is an integer number (37360731).

Almost surely, 2^74721461 is an apocalyptic number.

It is an amenable number.

74721461 is a deficient number, since it is larger than the sum of its proper divisors (1).

74721461 is an equidigital number, since it uses as much as digits as its factorization.

74721461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 74721461 is about 8644.1576223482. The cubic root of 74721461 is about 421.1936208216.

The spelling of 74721461 in words is "seventy-four million, seven hundred twenty-one thousand, four hundred sixty-one".