40074521 has 2 divisors, whose sum is σ = 40074522. Its totient is φ = 40074520.

The previous prime is 40074497. The next prime is 40074523. The reversal of 40074521 is 12547004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 698896 = 6275^2 + 836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40074521 is a prime.

Together with 40074523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40074523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20037260 + 20037261.

It is an arithmetic number, because the mean of its divisors is an integer number (20037261).

Almost surely, 2^40074521 is an apocalyptic number.

It is an amenable number.

40074521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40074521 is an equidigital number, since it uses as much as digits as its factorization.

40074521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 40074521 is about 6330.4439812702. The cubic root of 40074521 is about 342.2074394433.

The spelling of 40074521 in words is "forty million, seventy-four thousand, five hundred twenty-one".