401140555 has 16 divisors (see below), whose sum is σ = 486111744. Its totient is φ = 317766240.

The previous prime is 401140547. The next prime is 401140561. The reversal of 401140555 is 555041104.

It is a happy number.

It is not a de Polignac number, because 401140555 - 2³ = 401140547 is a prime.

It is a Duffinian number.

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, 269022 + ... + 270508.

It is an arithmetic number, because the mean of its divisors is an integer number (30381984).

Almost surely, 2^401140555 is an apocalyptic number.

401140555 is a deficient number, since it is larger than the sum of its proper divisors (84971189).

401140555 is a wasteful number, since it uses less digits than its factorization.

401140555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 401140555 is about 20028.4935779005. The cubic root of 401140555 is about 737.5059419228.

Adding to 401140555 its reverse (555041104), we get a palindrome (956181659).

The spelling of 401140555 in words is "four hundred one million, one hundred forty thousand, five hundred fifty-five".