142381644 has 24 divisors (see below), whose sum is σ = 335651568. Its totient is φ = 46970880.

The previous prime is 142381639. The next prime is 142381663. The reversal of 142381644 is 446183241.

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, 59997 + ... + 62324.

It is an arithmetic number, because the mean of its divisors is an integer number (13985482).

Almost surely, 2^142381644 is an apocalyptic number.

It is an amenable number.

142381644 is an abundant number, since it is smaller than the sum of its proper divisors (193269924).

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

142381644 is a wasteful number, since it uses less digits than its factorization.

142381644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122425 (or 122423 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 142381644 is about 11932.3779692063. The cubic root of 142381644 is about 522.1773153142.

The spelling of 142381644 in words is "one hundred forty-two million, three hundred eighty-one thousand, six hundred forty-four".