7522129 has 4 divisors (see below), whose sum is σ = 7530084. Its totient is φ = 7514176.

The previous prime is 7522111. The next prime is 7522159. The reversal of 7522129 is 9212257.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9212257 = 1171 ⋅7867.

It can be written as a sum of positive squares in 2 ways, for example, as 762129 + 6760000 = 873^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 7522129 - 2⁹ = 7521617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7522097 and 7522106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7522159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332 + ... + 4525.

It is an arithmetic number, because the mean of its divisors is an integer number (1882521).

Almost surely, 2^7522129 is an apocalyptic number.

It is an amenable number.

7522129 is a deficient number, since it is larger than the sum of its proper divisors (7955).

7522129 is a wasteful number, since it uses less digits than its factorization.

7522129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954.

The product of its digits is 2520, while the sum is 28.

The square root of 7522129 is about 2742.6499958981. The cubic root of 7522129 is about 195.9357088180.

The spelling of 7522129 in words is "seven million, five hundred twenty-two thousand, one hundred twenty-nine".