7122129 has 16 divisors (see below), whose sum is σ = 10907520. Its totient is φ = 4049280.

The previous prime is 7122121. The next prime is 7122149. The reversal of 7122129 is 9212217.

7122129 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7122129 - 2³ = 7122121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7122099 and 7122108.

It is not an unprimeable number, because it can be changed into a prime (7122121) 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, 4069 + ... + 5549.

It is an arithmetic number, because the mean of its divisors is an integer number (681720).

Almost surely, 2^7122129 is an apocalyptic number.

It is an amenable number.

7122129 is a deficient number, since it is larger than the sum of its proper divisors (3785391).

7122129 is a wasteful number, since it uses less digits than its factorization.

7122129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its digits is 504, while the sum is 24.

The square root of 7122129 is about 2668.7317212489. The cubic root of 7122129 is about 192.3992073682.

It can be divided in two parts, 712212 and 9, that added together give a triangular number (712221 = T₁₁₉₃).

The spelling of 7122129 in words is "seven million, one hundred twenty-two thousand, one hundred twenty-nine".