401362581 has 32 divisors (see below), whose sum is σ = 585216000. Its totient is φ = 243891648.

The previous prime is 401362567. The next prime is 401362589. The reversal of 401362581 is 185263104.

It is not a de Polignac number, because 401362581 - 2⁷ = 401362453 is a prime.

It is a super-2 number, since 2×401362581² = 322183842853963122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401362589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156810 + ... + 159348.

It is an arithmetic number, because the mean of its divisors is an integer number (18288000).

Almost surely, 2^401362581 is an apocalyptic number.

It is an amenable number.

401362581 is a deficient number, since it is larger than the sum of its proper divisors (183853419).

401362581 is a wasteful number, since it uses less digits than its factorization.

401362581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 401362581 is about 20034.0355645087. The cubic root of 401362581 is about 737.6419834268.

The spelling of 401362581 in words is "four hundred one million, three hundred sixty-two thousand, five hundred eighty-one".