142172220 has 24 divisors (see below), whose sum is σ = 398082384. Its totient is φ = 37912576.

The previous prime is 142172213. The next prime is 142172263. The reversal of 142172220 is 22271241.

142172220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1184709 + ... + 1184828.

It is an arithmetic number, because the mean of its divisors is an integer number (16586766).

Almost surely, 2^142172220 is an apocalyptic number.

142172220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142172220 is an abundant number, since it is smaller than the sum of its proper divisors (255910164).

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

142172220 is a wasteful number, since it uses less digits than its factorization.

142172220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369549 (or 2369547 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 142172220 is about 11923.5992888054. The cubic root of 142172220 is about 521.9211724599.

The spelling of 142172220 in words is "one hundred forty-two million, one hundred seventy-two thousand, two hundred twenty".