142639872 has 72 divisors (see below), whose sum is σ = 384599040. Its totient is φ = 46924800.

The previous prime is 142639867. The next prime is 142639927. The reversal of 142639872 is 278936241.

It is a super-2 number, since 2×142639872² = 40692266168352768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59497 + ... + 61847.

Almost surely, 2^142639872 is an apocalyptic number.

142639872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142639872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192299520).

142639872 is an abundant number, since it is smaller than the sum of its proper divisors (241959168).

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

142639872 is an equidigital number, since it uses as much as digits as its factorization.

142639872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2435 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 142639872 is about 11943.1935427674. The cubic root of 142639872 is about 522.4928039423.

The spelling of 142639872 in words is "one hundred forty-two million, six hundred thirty-nine thousand, eight hundred seventy-two".