401133621 has 32 divisors (see below), whose sum is σ = 623515648. Its totient is φ = 224648640.

The previous prime is 401133589. The next prime is 401133631. The reversal of 401133621 is 126331104.

It is not a de Polignac number, because 401133621 - 2⁵ = 401133589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401133631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623526 + ... + 624168.

It is an arithmetic number, because the mean of its divisors is an integer number (19484864).

Almost surely, 2^401133621 is an apocalyptic number.

It is an amenable number.

401133621 is a deficient number, since it is larger than the sum of its proper divisors (222382027).

401133621 is a wasteful number, since it uses less digits than its factorization.

401133621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 401133621 is about 20028.3204737691. The cubic root of 401133621 is about 737.5016924600.

Adding to 401133621 its reverse (126331104), we get a palindrome (527464725).

It can be divided in two parts, 40113 and 3621, that added together give a palindrome (43734).

The spelling of 401133621 in words is "four hundred one million, one hundred thirty-three thousand, six hundred twenty-one".