8722129 has 16 divisors (see below), whose sum is σ = 10128384. Its totient is φ = 7444800.

The previous prime is 8722123. The next prime is 8722169. The reversal of 8722129 is 9212278.

It is a cyclic number.

It is not a de Polignac number, because 8722129 - 2⁵ = 8722097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

Its product of digits (4032) is a multiple of the sum of its prime divisors (1008).

It is a self number, because there is not a number n which added to its sum of digits gives 8722129.

It is not an unprimeable number, because it can be changed into a prime (8722123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8799 + ... + 9739.

It is an arithmetic number, because the mean of its divisors is an integer number (633024).

Almost surely, 2^8722129 is an apocalyptic number.

It is an amenable number.

8722129 is a deficient number, since it is larger than the sum of its proper divisors (1406255).

8722129 is a wasteful number, since it uses less digits than its factorization.

8722129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008.

The product of its digits is 4032, while the sum is 31.

The square root of 8722129 is about 2953.3250752330. The cubic root of 8722129 is about 205.8452430545.

The spelling of 8722129 in words is "eight million, seven hundred twenty-two thousand, one hundred twenty-nine".