401321156 has 48 divisors (see below), whose sum is σ = 736253952. Its totient is φ = 191268000.

The previous prime is 401321149. The next prime is 401321171. The reversal of 401321156 is 651123104.

It is a super-2 number, since 2×401321156² = 322117340506352672, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1901891 + ... + 1902101.

It is an arithmetic number, because the mean of its divisors is an integer number (15338624).

Almost surely, 2^401321156 is an apocalyptic number.

It is an amenable number.

401321156 is a deficient number, since it is larger than the sum of its proper divisors (334932796).

401321156 is a wasteful number, since it uses less digits than its factorization.

401321156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 401321156 is about 20033.0016722407. The cubic root of 401321156 is about 737.6166049852.

The spelling of 401321156 in words is "four hundred one million, three hundred twenty-one thousand, one hundred fifty-six".