40462921 has 2 divisors, whose sum is σ = 40462922. Its totient is φ = 40462920.

The previous prime is 40462909. The next prime is 40462937. The reversal of 40462921 is 12926404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39879225 + 583696 = 6315^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 40462921 - 2⁵ = 40462889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40462921.

It is not a weakly prime, because it can be changed into another prime (40462901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20231460 + 20231461.

It is an arithmetic number, because the mean of its divisors is an integer number (20231461).

Almost surely, 2^40462921 is an apocalyptic number.

It is an amenable number.

40462921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40462921 is an equidigital number, since it uses as much as digits as its factorization.

40462921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40462921 is about 6361.0471622210. The cubic root of 40462921 is about 343.3094386446.

The spelling of 40462921 in words is "forty million, four hundred sixty-two thousand, nine hundred twenty-one".