64142857 has 2 divisors, whose sum is σ = 64142858. Its totient is φ = 64142856.

The previous prime is 64142849. The next prime is 64142909. The reversal of 64142857 is 75824146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 1115136 = 7939^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 64142857 - 2³ = 64142849 is a prime.

It is a super-2 number, since 2×64142857² = 8228612208244898, which contains 22 as substring.

64142857 is a modest number, since divided by 142857 gives 64 as remainder.

It is not a weakly prime, because it can be changed into another prime (64142257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071428 + 32071429.

It is an arithmetic number, because the mean of its divisors is an integer number (32071429).

Almost surely, 2^64142857 is an apocalyptic number.

It is an amenable number.

64142857 is a deficient number, since it is larger than the sum of its proper divisors (1).

64142857 is an equidigital number, since it uses as much as digits as its factorization.

64142857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 64142857 is about 8008.9235856013. The cubic root of 64142857 is about 400.2973975819.

The spelling of 64142857 in words is "sixty-four million, one hundred forty-two thousand, eight hundred fifty-seven".