40726521 has 12 divisors (see below), whose sum is σ = 64175280. Its totient is φ = 24682680.

The previous prime is 40726513. The next prime is 40726531. The reversal of 40726521 is 12562704.

40726521 is a `hidden beast` number, since 4 + 0 + 7 + 2 + 652 + 1 = 666.

It is not a de Polignac number, because 40726521 - 2³ = 40726513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40726501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205591 + ... + 205788.

It is an arithmetic number, because the mean of its divisors is an integer number (5347940).

Almost surely, 2^40726521 is an apocalyptic number.

It is an amenable number.

40726521 is a deficient number, since it is larger than the sum of its proper divisors (23448759).

40726521 is a wasteful number, since it uses less digits than its factorization.

40726521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411396 (or 411393 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 40726521 is about 6381.7333852175. The cubic root of 40726521 is about 344.0533341905.

The spelling of 40726521 in words is "forty million, seven hundred twenty-six thousand, five hundred twenty-one".