142157224 has 32 divisors (see below), whose sum is σ = 292026240. Its totient is φ = 64339200.

The previous prime is 142157189. The next prime is 142157233. The reversal of 142157224 is 422751241.

It is a junction number, because it is equal to n+sod(n) for n = 142157192 and 142157201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17857 + ... + 24559.

It is an arithmetic number, because the mean of its divisors is an integer number (9125820).

Almost surely, 2^142157224 is an apocalyptic number.

It is an amenable number.

142157224 is an abundant number, since it is smaller than the sum of its proper divisors (149869016).

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

142157224 is a wasteful number, since it uses less digits than its factorization.

142157224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961 (or 6957 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 142157224 is about 11922.9704352565. The cubic root of 142157224 is about 521.9028214649.

The spelling of 142157224 in words is "one hundred forty-two million, one hundred fifty-seven thousand, two hundred twenty-four".