56409257 has 2 divisors, whose sum is σ = 56409258. Its totient is φ = 56409256.

The previous prime is 56409253. The next prime is 56409277. The reversal of 56409257 is 75290465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 3759721 = 7256^2 + 1939^2 .

It is a cyclic number.

It is not a de Polignac number, because 56409257 - 2² = 56409253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56409257.

It is not a weakly prime, because it can be changed into another prime (56409253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28204628 + 28204629.

It is an arithmetic number, because the mean of its divisors is an integer number (28204629).

Almost surely, 2^56409257 is an apocalyptic number.

It is an amenable number.

56409257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56409257 is an equidigital number, since it uses as much as digits as its factorization.

56409257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 56409257 is about 7510.6096290514. The cubic root of 56409257 is about 383.5159758925.

The spelling of 56409257 in words is "fifty-six million, four hundred nine thousand, two hundred fifty-seven".