401404155 has 16 divisors (see below), whose sum is σ = 642873120. Its totient is φ = 213873408.

The previous prime is 401404121. The next prime is 401404177. The reversal of 401404155 is 551404104.

It is a happy number.

It is not a de Polignac number, because 401404155 - 2¹⁴ = 401387771 is a prime.

It is a super-2 number, since 2×401404155² = 322250591302528050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3519 + ... + 28551.

It is an arithmetic number, because the mean of its divisors is an integer number (40179570).

Almost surely, 2^401404155 is an apocalyptic number.

401404155 is a deficient number, since it is larger than the sum of its proper divisors (241468965).

401404155 is a wasteful number, since it uses less digits than its factorization.

401404155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26110.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 401404155 is about 20035.0731219030. The cubic root of 401404155 is about 737.6674513956.

Adding to 401404155 its reverse (551404104), we get a palindrome (952808259).

The spelling of 401404155 in words is "four hundred one million, four hundred four thousand, one hundred fifty-five".