401521039 has 2 divisors, whose sum is σ = 401521040. Its totient is φ = 401521038.

The previous prime is 401521033. The next prime is 401521061. The reversal of 401521039 is 930125104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401521039 - 2⁵ = 401521007 is a prime.

It is a super-2 number, since 2×401521039² = 322438289519279042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401521033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200760519 + 200760520.

It is an arithmetic number, because the mean of its divisors is an integer number (200760520).

Almost surely, 2^401521039 is an apocalyptic number.

401521039 is a deficient number, since it is larger than the sum of its proper divisors (1).

401521039 is an equidigital number, since it uses as much as digits as its factorization.

401521039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 401521039 is about 20037.9898941985. The cubic root of 401521039 is about 737.7390443722.

The spelling of 401521039 in words is "four hundred one million, five hundred twenty-one thousand, thirty-nine".