72129675 has 12 divisors (see below), whose sum is σ = 119254520. Its totient is φ = 38469120.

The previous prime is 72129671. The next prime is 72129677. The reversal of 72129675 is 57692127.

It is not a de Polignac number, because 72129675 - 2² = 72129671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72129671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480790 + ... + 480939.

Almost surely, 2^72129675 is an apocalyptic number.

72129675 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72129675 is a deficient number, since it is larger than the sum of its proper divisors (47124845).

72129675 is a wasteful number, since it uses less digits than its factorization.

72129675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961742 (or 961737 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 72129675 is about 8492.9191094700. The cubic root of 72129675 is about 416.2663693298.

The spelling of 72129675 in words is "seventy-two million, one hundred twenty-nine thousand, six hundred seventy-five".