142255840 has 48 divisors (see below), whose sum is σ = 343248192. Its totient is φ = 55688704.

The previous prime is 142255801. The next prime is 142255871. The reversal of 142255840 is 48552241.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1939 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (7151004).

Almost surely, 2^142255840 is an apocalyptic number.

142255840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142255840 is an abundant number, since it is smaller than the sum of its proper divisors (200992352).

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

142255840 is a wasteful number, since it uses less digits than its factorization.

142255840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18979 (or 18971 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 142255840 is about 11927.1052648998. The cubic root of 142255840 is about 522.0234767752.

The spelling of 142255840 in words is "one hundred forty-two million, two hundred fifty-five thousand, eight hundred forty".