56142409 has 2 divisors, whose sum is σ = 56142410. Its totient is φ = 56142408.

The previous prime is 56142403. The next prime is 56142419. The reversal of 56142409 is 90424165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33674809 + 22467600 = 5803^2 + 4740^2 .

It is a cyclic number.

It is not a de Polignac number, because 56142409 - 2¹¹ = 56140361 is a prime.

It is not a weakly prime, because it can be changed into another prime (56142403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28071204 + 28071205.

It is an arithmetic number, because the mean of its divisors is an integer number (28071205).

Almost surely, 2^56142409 is an apocalyptic number.

It is an amenable number.

56142409 is a deficient number, since it is larger than the sum of its proper divisors (1).

56142409 is an equidigital number, since it uses as much as digits as its factorization.

56142409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 56142409 is about 7492.8238335090. The cubic root of 56142409 is about 382.9102699124.

The spelling of 56142409 in words is "fifty-six million, one hundred forty-two thousand, four hundred nine".