57142489 has 2 divisors, whose sum is σ = 57142490. Its totient is φ = 57142488.

The previous prime is 57142471. The next prime is 57142493. The reversal of 57142489 is 98424175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44997264 + 12145225 = 6708^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 57142489 - 2¹⁵ = 57109721 is a prime.

It is not a weakly prime, because it can be changed into another prime (57142439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28571244 + 28571245.

It is an arithmetic number, because the mean of its divisors is an integer number (28571245).

Almost surely, 2^57142489 is an apocalyptic number.

It is an amenable number.

57142489 is a deficient number, since it is larger than the sum of its proper divisors (1).

57142489 is an equidigital number, since it uses as much as digits as its factorization.

57142489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 57142489 is about 7559.2651097842. The cubic root of 57142489 is about 385.1705299536.

The spelling of 57142489 in words is "fifty-seven million, one hundred forty-two thousand, four hundred eighty-nine".