401512761 has 32 divisors (see below), whose sum is σ = 644017920. Its totient is φ = 245763072.

The previous prime is 401512757. The next prime is 401512763. The reversal of 401512761 is 167215104.

It is a happy number.

It is not a de Polignac number, because 401512761 - 2² = 401512757 is a prime.

It is a super-2 number, since 2×401512761² = 322424994491686242, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401512763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64780 + ... + 70706.

It is an arithmetic number, because the mean of its divisors is an integer number (20125560).

Almost surely, 2^401512761 is an apocalyptic number.

It is an amenable number.

401512761 is a deficient number, since it is larger than the sum of its proper divisors (242505159).

401512761 is a wasteful number, since it uses less digits than its factorization.

401512761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6142 (or 6136 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 401512761 is about 20037.7833354890. The cubic root of 401512761 is about 737.7339744463.

Adding to 401512761 its reverse (167215104), we get a palindrome (568727865).

The spelling of 401512761 in words is "four hundred one million, five hundred twelve thousand, seven hundred sixty-one".