401236655 has 16 divisors (see below), whose sum is σ = 498938880. Its totient is φ = 309542688.

The previous prime is 401236643. The next prime is 401236673. The reversal of 401236655 is 556632104.

It is a cyclic number.

It is not a de Polignac number, because 401236655 - 2¹⁴ = 401220271 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, 5174 + ... + 28796.

It is an arithmetic number, because the mean of its divisors is an integer number (31183680).

Almost surely, 2^401236655 is an apocalyptic number.

401236655 is a deficient number, since it is larger than the sum of its proper divisors (97702225).

401236655 is a wasteful number, since it uses less digits than its factorization.

401236655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23750.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 401236655 is about 20030.8925163109. The cubic root of 401236655 is about 737.5648312250.

Adding to 401236655 its reverse (556632104), we get a palindrome (957868759).

The spelling of 401236655 in words is "four hundred one million, two hundred thirty-six thousand, six hundred fifty-five".