401332421 has 16 divisors (see below), whose sum is σ = 499459200. Its totient is φ = 314653248.

The previous prime is 401332411. The next prime is 401332433. The reversal of 401332421 is 124233104.

It is a de Polignac number, because none of the positive numbers 2^k-401332421 is a prime.

It is a super-2 number, since 2×401332421² = 322135424291442482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401332393 and 401332402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401332411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48170 + ... + 55883.

It is an arithmetic number, because the mean of its divisors is an integer number (31216200).

Almost surely, 2^401332421 is an apocalyptic number.

It is an amenable number.

401332421 is a deficient number, since it is larger than the sum of its proper divisors (98126779).

401332421 is a wasteful number, since it uses less digits than its factorization.

401332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104108.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 401332421 is about 20033.2828313285. The cubic root of 401332421 is about 737.6235065013.

Adding to 401332421 its reverse (124233104), we get a palindrome (525565525).

The spelling of 401332421 in words is "four hundred one million, three hundred thirty-two thousand, four hundred twenty-one".