142171900 has 36 divisors (see below), whose sum is σ = 332247832. Its totient is φ = 52493760.

The previous prime is 142171879. The next prime is 142171903. The reversal of 142171900 is 9171241.

142171900 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×142171900² = 40425698299220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53382 + ... + 55981.

Almost surely, 2^142171900 is an apocalyptic number.

142171900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142171900 is an abundant number, since it is smaller than the sum of its proper divisors (190075932).

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

142171900 is a wasteful number, since it uses less digits than its factorization.

142171900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109390 (or 109383 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 142171900 is about 11923.5858700309. The cubic root of 142171900 is about 521.9207808811.

The spelling of 142171900 in words is "one hundred forty-two million, one hundred seventy-one thousand, nine hundred".