142899856 has 20 divisors (see below), whose sum is σ = 302038704. Its totient is φ = 64954400.

The previous prime is 142899853. The next prime is 142899859. The reversal of 142899856 is 658998241.

It is an interprime number because it is at equal distance from previous prime (142899853) and next prime (142899859).

It is not an unprimeable number, because it can be changed into a prime (142899853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405790 + ... + 406141.

Almost surely, 2^142899856 is an apocalyptic number.

142899856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

142899856 is an abundant number, since it is smaller than the sum of its proper divisors (159138848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142899856 is a wasteful number, since it uses less digits than its factorization.

142899856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811950 (or 811944 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 142899856 is about 11954.0727787646. The cubic root of 142899856 is about 522.8100535322.

It can be divided in two parts, 142 and 899856, that added together give a palindrome (899998).

The spelling of 142899856 in words is "one hundred forty-two million, eight hundred ninety-nine thousand, eight hundred fifty-six".