401605617 has 24 divisors (see below), whose sum is σ = 623906496. Its totient is φ = 229117728.

The previous prime is 401605613. The next prime is 401605627. The reversal of 401605617 is 716506104.

It is not a de Polignac number, because 401605617 - 2² = 401605613 is a prime.

It is a super-2 number, since 2×401605617² = 322574143211901378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401605613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107383 + ... + 111059.

It is an arithmetic number, because the mean of its divisors is an integer number (25996104).

Almost surely, 2^401605617 is an apocalyptic number.

It is an amenable number.

401605617 is a deficient number, since it is larger than the sum of its proper divisors (222300879).

401605617 is a wasteful number, since it uses less digits than its factorization.

401605617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437 (or 4430 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 401605617 is about 20040.1002243003. The cubic root of 401605617 is about 737.7908408380.

The spelling of 401605617 in words is "four hundred one million, six hundred five thousand, six hundred seventeen".