401221432 has 16 divisors (see below), whose sum is σ = 762596640. Its totient is φ = 197862336.

The previous prime is 401221421. The next prime is 401221441. The reversal of 401221432 is 234122104.

It is a super-2 number, since 2×401221432² = 321957274992261248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342928 + ... + 344095.

It is an arithmetic number, because the mean of its divisors is an integer number (47662290).

Almost surely, 2^401221432 is an apocalyptic number.

It is an amenable number.

401221432 is a deficient number, since it is larger than the sum of its proper divisors (361375208).

401221432 is a wasteful number, since it uses less digits than its factorization.

401221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687102 (or 687098 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 401221432 is about 20030.5125246460. The cubic root of 401221432 is about 737.5555033206. Note that the first 4 decimals are identical.

Adding to 401221432 its reverse (234122104), we get a palindrome (635343536).

The spelling of 401221432 in words is "four hundred one million, two hundred twenty-one thousand, four hundred thirty-two".