64857142 has 32 divisors (see below), whose sum is σ = 119368512. Its totient is φ = 25795584.

The previous prime is 64857119. The next prime is 64857161. The reversal of 64857142 is 24175846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15508 + ... + 19240.

It is an arithmetic number, because the mean of its divisors is an integer number (3730266).

Almost surely, 2^64857142 is an apocalyptic number.

64857142 is a deficient number, since it is larger than the sum of its proper divisors (54511370).

64857142 is a wasteful number, since it uses less digits than its factorization.

64857142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832.

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

The square root of 64857142 is about 8053.3931979011. The cubic root of 64857142 is about 401.7777993676. Note that the first 4 decimals are identical.

The spelling of 64857142 in words is "sixty-four million, eight hundred fifty-seven thousand, one hundred forty-two".