72142252 has 24 divisors (see below), whose sum is σ = 155384096. Its totient is φ = 28539648.

The previous prime is 72142249. The next prime is 72142307. The reversal of 72142252 is 25224127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98733 + ... + 99460.

Almost surely, 2^72142252 is an apocalyptic number.

It is an amenable number.

72142252 is an abundant number, since it is smaller than the sum of its proper divisors (83241844).

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

72142252 is a wasteful number, since it uses less digits than its factorization.

72142252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198217 (or 198215 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 72142252 is about 8493.6595175460. The cubic root of 72142252 is about 416.2905622290.

Adding to 72142252 its reverse (25224127), we get a palindrome (97366379).

The spelling of 72142252 in words is "seventy-two million, one hundred forty-two thousand, two hundred fifty-two".