64142557 has 2 divisors, whose sum is σ = 64142558. Its totient is φ = 64142556.

The previous prime is 64142539. The next prime is 64142587. The reversal of 64142557 is 75524146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45010681 + 19131876 = 6709^2 + 4374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64142557 is a prime.

It is a super-2 number, since 2×64142557² = 8228535236996498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64142527) 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, 32071278 + 32071279.

It is an arithmetic number, because the mean of its divisors is an integer number (32071279).

Almost surely, 2^64142557 is an apocalyptic number.

It is an amenable number.

64142557 is a deficient number, since it is larger than the sum of its proper divisors (1).

64142557 is an equidigital number, since it uses as much as digits as its factorization.

64142557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 34.

The square root of 64142557 is about 8008.9048564707. The cubic root of 64142557 is about 400.2967735093.

The spelling of 64142557 in words is "sixty-four million, one hundred forty-two thousand, five hundred fifty-seven".