401416561 has 16 divisors (see below), whose sum is σ = 500827264. Its totient is φ = 313248384.

The previous prime is 401416549. The next prime is 401416573. The reversal of 401416561 is 165614104.

It is an interprime number because it is at equal distance from previous prime (401416549) and next prime (401416573).

It is a cyclic number.

It is not a de Polignac number, because 401416561 - 2¹¹ = 401414513 is a prime.

It is a super-2 number, since 2×401416561² = 322270510890133442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401416511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23571 + ... + 36856.

It is an arithmetic number, because the mean of its divisors is an integer number (31301704).

Almost surely, 2^401416561 is an apocalyptic number.

It is an amenable number.

401416561 is a deficient number, since it is larger than the sum of its proper divisors (99410703).

401416561 is a wasteful number, since it uses less digits than its factorization.

401416561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60520.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 401416561 is about 20035.3827265665. The cubic root of 401416561 is about 737.6750508918.

The spelling of 401416561 in words is "four hundred one million, four hundred sixteen thousand, five hundred sixty-one".