401445121 has 16 divisors (see below), whose sum is σ = 503516160. Its totient is φ = 310931280.

The previous prime is 401445113. The next prime is 401445131. The reversal of 401445121 is 121544104.

It is not a de Polignac number, because 401445121 - 2³ = 401445113 is a prime.

It is a super-2 number, since 2×401445121² = 322316370349409282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401445092 and 401445101.

It is not an unprimeable number, because it can be changed into a prime (401445101) 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, 2751 + ... + 28468.

It is an arithmetic number, because the mean of its divisors is an integer number (31469760).

Almost surely, 2^401445121 is an apocalyptic number.

It is an amenable number.

401445121 is a deficient number, since it is larger than the sum of its proper divisors (102071039).

401445121 is a wasteful number, since it uses less digits than its factorization.

401445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31404.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 401445121 is about 20036.0954529569. The cubic root of 401445121 is about 737.6925451873.

Adding to 401445121 its reverse (121544104), we get a palindrome (522989225).

The spelling of 401445121 in words is "four hundred one million, four hundred forty-five thousand, one hundred twenty-one".