401206555 has 32 divisors (see below), whose sum is σ = 507570624. Its totient is φ = 304152576.

The previous prime is 401206537. The next prime is 401206573. The reversal of 401206555 is 555602104.

It is an interprime number because it is at equal distance from previous prime (401206537) and next prime (401206573).

It is a cyclic number.

It is not a de Polignac number, because 401206555 - 2⁷ = 401206427 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1560987 + ... + 1561243.

It is an arithmetic number, because the mean of its divisors is an integer number (15861582).

Almost surely, 2^401206555 is an apocalyptic number.

401206555 is a deficient number, since it is larger than the sum of its proper divisors (106364069).

401206555 is a wasteful number, since it uses less digits than its factorization.

401206555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 401206555 is about 20030.1411627577. The cubic root of 401206555 is about 737.5463872001.

Adding to 401206555 its reverse (555602104), we get a palindrome (956808659).

The spelling of 401206555 in words is "four hundred one million, two hundred six thousand, five hundred fifty-five".