56126681 has 4 divisors (see below), whose sum is σ = 60444132. Its totient is φ = 51809232.

The previous prime is 56126621. The next prime is 56126683. The reversal of 56126681 is 18662165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18662165 = 5 ⋅3732433.

It can be written as a sum of positive squares in 2 ways, for example, as 12355225 + 43771456 = 3515^2 + 6616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56126681 is a prime.

It is a super-2 number, since 2×56126681² = 6300408640151522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56126683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158706 + ... + 2158731.

It is an arithmetic number, because the mean of its divisors is an integer number (15111033).

Almost surely, 2^56126681 is an apocalyptic number.

It is an amenable number.

56126681 is a deficient number, since it is larger than the sum of its proper divisors (4317451).

56126681 is a wasteful number, since it uses less digits than its factorization.

56126681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317450.

The product of its digits is 17280, while the sum is 35.

The square root of 56126681 is about 7491.7742224389. The cubic root of 56126681 is about 382.8745098082.

The spelling of 56126681 in words is "fifty-six million, one hundred twenty-six thousand, six hundred eighty-one".