401261553 has 64 divisors (see below), whose sum is σ = 745021440. Its totient is φ = 207360000.

The previous prime is 401261543. The next prime is 401261579. The reversal of 401261553 is 355162104.

401261553 is a `hidden beast` number, since 40 + 1 + 2 + 615 + 5 + 3 = 666.

It is not a de Polignac number, because 401261553 - 2⁵ = 401261521 is a prime.

It is a super-2 number, since 2×401261553² = 322021667831943618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (401261543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 533928 + ... + 534678.

It is an arithmetic number, because the mean of its divisors is an integer number (11640960).

Almost surely, 2^401261553 is an apocalyptic number.

It is an amenable number.

401261553 is a deficient number, since it is larger than the sum of its proper divisors (343759887).

401261553 is a wasteful number, since it uses less digits than its factorization.

401261553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 401261553 is about 20031.5139967003. The cubic root of 401261553 is about 737.5800869842.

The spelling of 401261553 in words is "four hundred one million, two hundred sixty-one thousand, five hundred fifty-three".