70056521 has 2 divisors, whose sum is σ = 70056522. Its totient is φ = 70056520.

The previous prime is 70056451. The next prime is 70056527. The reversal of 70056521 is 12565007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 6056521 = 8000^2 + 2461^2 .

It is a cyclic number.

It is not a de Polignac number, because 70056521 - 2¹⁸ = 69794377 is a prime.

It is a super-2 number, since 2×70056521² = 9815832269246882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70056527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35028260 + 35028261.

It is an arithmetic number, because the mean of its divisors is an integer number (35028261).

Almost surely, 2^70056521 is an apocalyptic number.

It is an amenable number.

70056521 is a deficient number, since it is larger than the sum of its proper divisors (1).

70056521 is an equidigital number, since it uses as much as digits as its factorization.

70056521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 70056521 is about 8369.9773595871. The cubic root of 70056521 is about 412.2394235521.

The spelling of 70056521 in words is "seventy million, fifty-six thousand, five hundred twenty-one".