10056721 has 2 divisors, whose sum is σ = 10056722. Its totient is φ = 10056720.

The previous prime is 10056713. The next prime is 10056737. The reversal of 10056721 is 12765001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7623121 + 2433600 = 2761^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 10056721 - 2³ = 10056713 is a prime.

It is a super-2 number, since 2×10056721² = 202275274543682, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 10056692 and 10056701.

It is not a weakly prime, because it can be changed into another prime (10056701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5028360 + 5028361.

It is an arithmetic number, because the mean of its divisors is an integer number (5028361).

Almost surely, 2^10056721 is an apocalyptic number.

It is an amenable number.

10056721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10056721 is an equidigital number, since it uses as much as digits as its factorization.

10056721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 10056721 is about 3171.2333562827. The cubic root of 10056721 is about 215.8500402320.

The spelling of 10056721 in words is "ten million, fifty-six thousand, seven hundred twenty-one".