401520455 has 24 divisors (see below), whose sum is σ = 573539472. Its totient is φ = 268918272.

The previous prime is 401520443. The next prime is 401520479. The reversal of 401520455 is 554025104.

It is not a de Polignac number, because 401520455 - 2⁴ = 401520439 is a prime.

It is a super-2 number, since 2×401520455² = 322437351566814050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8522 + ... + 29591.

It is an arithmetic number, because the mean of its divisors is an integer number (23897478).

Almost surely, 2^401520455 is an apocalyptic number.

401520455 is a deficient number, since it is larger than the sum of its proper divisors (172019017).

401520455 is a wasteful number, since it uses less digits than its factorization.

401520455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38175 (or 38168 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 401520455 is about 20037.9753218732. The cubic root of 401520455 is about 737.7386866991.

Adding to 401520455 its reverse (554025104), we get a palindrome (955545559).

The spelling of 401520455 in words is "four hundred one million, five hundred twenty thousand, four hundred fifty-five".