142238921772 has 24 divisors (see below), whose sum is σ = 331912504000. Its totient is φ = 47409875856.

The previous prime is 142238921731. The next prime is 142238921801. The reversal of 142238921772 is 277129832241.

It is a super-2 number, since 2×142238921772² (a number of 23 digits) contains 22 as substring.

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, 192022 + ... + 566877.

Almost surely, 2^142238921772 is an apocalyptic number.

142238921772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

142238921772 is an abundant number, since it is smaller than the sum of its proper divisors (189673582228).

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

142238921772 is a wasteful number, since it uses less digits than its factorization.

142238921772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774525 (or 774523 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The spelling of 142238921772 in words is "one hundred forty-two billion, two hundred thirty-eight million, nine hundred twenty-one thousand, seven hundred seventy-two".