461681 has 12 divisors (see below), whose sum is σ = 541680. Its totient is φ = 389160.

The previous prime is 461677. The next prime is 461687. The reversal of 461681 is 186164.

It is not a de Polignac number, because 461681 - 2² = 461677 is a prime.

It is a super-2 number, since 2×461681² = 426298691522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 461681.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 461681.

It is not an unprimeable number, because it can be changed into a prime (461687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9800 + ... + 9846.

It is an arithmetic number, because the mean of its divisors is an integer number (45140).

2⁴⁶¹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

461681 is a deficient number, since it is larger than the sum of its proper divisors (79999).

461681 is a wasteful number, since it uses less digits than its factorization.

461681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 77 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 461681 is about 679.4711178556. The cubic root of 461681 is about 77.2883437453.

The spelling of 461681 in words is "four hundred sixty-one thousand, six hundred eighty-one".