142865857 has 4 divisors (see below), whose sum is σ = 149077440. Its totient is φ = 136654276.

The previous prime is 142865851. The next prime is 142865869. The reversal of 142865857 is 758568241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142865857 is a prime.

It is a super-3 number, since 3×142865857³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142865851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3105757 + ... + 3105802.

It is an arithmetic number, because the mean of its divisors is an integer number (37269360).

Almost surely, 2^142865857 is an apocalyptic number.

It is an amenable number.

142865857 is a deficient number, since it is larger than the sum of its proper divisors (6211583).

142865857 is an equidigital number, since it uses as much as digits as its factorization.

142865857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211582.

The product of its digits is 537600, while the sum is 46.

The square root of 142865857 is about 11952.6506265347. The cubic root of 142865857 is about 522.7685875962.

The spelling of 142865857 in words is "one hundred forty-two million, eight hundred sixty-five thousand, eight hundred fifty-seven".