401715861 has 32 divisors (see below), whose sum is σ = 571076352. Its totient is φ = 250652160.

The previous prime is 401715857. The next prime is 401715877. The reversal of 401715861 is 168517104.

It is a happy number.

It is not a de Polignac number, because 401715861 - 2² = 401715857 is a prime.

It is a super-2 number, since 2×401715861² = 322751265957942642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401715851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 871171 + ... + 871631.

It is an arithmetic number, because the mean of its divisors is an integer number (17846136).

Almost surely, 2^401715861 is an apocalyptic number.

It is an amenable number.

401715861 is a deficient number, since it is larger than the sum of its proper divisors (169360491).

401715861 is a wasteful number, since it uses less digits than its factorization.

401715861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 401715861 is about 20042.8506206078. The cubic root of 401715861 is about 737.8583445187.

The spelling of 401715861 in words is "four hundred one million, seven hundred fifteen thousand, eight hundred sixty-one".