142171644 has 12 divisors (see below), whose sum is σ = 331733864. Its totient is φ = 47390544.

The previous prime is 142171637. The next prime is 142171681. The reversal of 142171644 is 446171241.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5923807 + ... + 5923830.

Almost surely, 2^142171644 is an apocalyptic number.

It is an amenable number.

142171644 is an abundant number, since it is smaller than the sum of its proper divisors (189562220).

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

142171644 is a wasteful number, since it uses less digits than its factorization.

142171644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847644 (or 11847642 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 142171644 is about 11923.5751350004. The cubic root of 142171644 is about 521.9204676176.

The spelling of 142171644 in words is "one hundred forty-two million, one hundred seventy-one thousand, six hundred forty-four".