72129246 has 16 divisors (see below), whose sum is σ = 164866944. Its totient is φ = 20608344.

The previous prime is 72129223. The next prime is 72129247. The reversal of 72129246 is 64292127.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72129247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858640 + ... + 858723.

It is an arithmetic number, because the mean of its divisors is an integer number (10304184).

Almost surely, 2^72129246 is an apocalyptic number.

72129246 is an abundant number, since it is smaller than the sum of its proper divisors (92737698).

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

72129246 is a wasteful number, since it uses less digits than its factorization.

72129246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717375.

The product of its digits is 12096, while the sum is 33.

The square root of 72129246 is about 8492.8938530986. The cubic root of 72129246 is about 416.2655440633.

The spelling of 72129246 in words is "seventy-two million, one hundred twenty-nine thousand, two hundred forty-six".