142171902 has 32 divisors (see below), whose sum is σ = 317344800. Its totient is φ = 47179584.

The previous prime is 142171879. The next prime is 142171903. The reversal of 142171902 is 209171241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142171903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6618 + ... + 18114.

It is an arithmetic number, because the mean of its divisors is an integer number (9917025).

Almost surely, 2^142171902 is an apocalyptic number.

142171902 is an abundant number, since it is smaller than the sum of its proper divisors (175172898).

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

142171902 is a wasteful number, since it uses less digits than its factorization.

142171902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11737 (or 11731 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 142171902 is about 11923.5859538983. The cubic root of 142171902 is about 521.9207833284.

The spelling of 142171902 in words is "one hundred forty-two million, one hundred seventy-one thousand, nine hundred two".