72129162 has 16 divisors (see below), whose sum is σ = 164866752. Its totient is φ = 20608320.

The previous prime is 72129107. The next prime is 72129191. The reversal of 72129162 is 26192127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858639 + ... + 858722.

It is an arithmetic number, because the mean of its divisors is an integer number (10304172).

Almost surely, 2^72129162 is an apocalyptic number.

72129162 is an abundant number, since it is smaller than the sum of its proper divisors (92737590).

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

72129162 is a wasteful number, since it uses less digits than its factorization.

72129162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717373.

The product of its digits is 3024, while the sum is 30.

The square root of 72129162 is about 8492.8889077863. Note that the first 3 decimals coincide. The cubic root of 72129162 is about 416.2653824722.

The spelling of 72129162 in words is "seventy-two million, one hundred twenty-nine thousand, one hundred sixty-two".