401613261 has 24 divisors (see below), whose sum is σ = 636174720. Its totient is φ = 224606592.

The previous prime is 401613229. The next prime is 401613283. The reversal of 401613261 is 162316104.

It is not a de Polignac number, because 401613261 - 2⁵ = 401613229 is a prime.

It is a super-2 number, since 2×401613261² = 322586422822108242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401613221) 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, 22156 + ... + 35973.

It is an arithmetic number, because the mean of its divisors is an integer number (26507280).

Almost surely, 2^401613261 is an apocalyptic number.

It is an amenable number.

401613261 is a deficient number, since it is larger than the sum of its proper divisors (234561459).

401613261 is a wasteful number, since it uses less digits than its factorization.

401613261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58193 (or 58186 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 401613261 is about 20040.2909410018. The cubic root of 401613261 is about 737.7955217464.

Adding to 401613261 its reverse (162316104), we get a palindrome (563929365).

The spelling of 401613261 in words is "four hundred one million, six hundred thirteen thousand, two hundred sixty-one".