401155205 has 16 divisors (see below), whose sum is σ = 556041024. Its totient is φ = 274586880.

The previous prime is 401155109. The next prime is 401155217. The reversal of 401155205 is 502551104.

It is a happy number.

It is not a de Polignac number, because 401155205 - 2²⁶ = 334046341 is a prime.

It is a congruent 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, 213587 + ... + 215456.

It is an arithmetic number, because the mean of its divisors is an integer number (34752564).

Almost surely, 2^401155205 is an apocalyptic number.

It is an amenable number.

401155205 is a deficient number, since it is larger than the sum of its proper divisors (154885819).

401155205 is a wasteful number, since it uses less digits than its factorization.

401155205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429076.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 401155205 is about 20028.8593035150. The cubic root of 401155205 is about 737.5149199318.

The spelling of 401155205 in words is "four hundred one million, one hundred fifty-five thousand, two hundred five".