56126621 has 2 divisors, whose sum is σ = 56126622. Its totient is φ = 56126620.

The previous prime is 56126611. The next prime is 56126683. The reversal of 56126621 is 12662165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 8323225 = 6914^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 56126621 - 2¹⁴ = 56110237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56126611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28063310 + 28063311.

It is an arithmetic number, because the mean of its divisors is an integer number (28063311).

Almost surely, 2^56126621 is an apocalyptic number.

It is an amenable number.

56126621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56126621 is an equidigital number, since it uses as much as digits as its factorization.

56126621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 56126621 is about 7491.7702180459. The cubic root of 56126621 is about 382.8743733759.

Adding to 56126621 its reverse (12662165), we get a palindrome (68788786).

The spelling of 56126621 in words is "fifty-six million, one hundred twenty-six thousand, six hundred twenty-one".