7525913 has 4 divisors (see below), whose sum is σ = 7592628. Its totient is φ = 7459200.

The previous prime is 7525907. The next prime is 7525943. The reversal of 7525913 is 3195257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3195257 = 13 ⋅245789.

It can be written as a sum of positive squares in 2 ways, for example, as 2521744 + 5004169 = 1588^2 + 2237^2 .

It is a cyclic number.

It is not a de Polignac number, because 7525913 - 2⁸ = 7525657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 7525913.

It is not an unprimeable number, because it can be changed into a prime (7525943) 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, 33188 + ... + 33413.

It is an arithmetic number, because the mean of its divisors is an integer number (1898157).

Almost surely, 2^7525913 is an apocalyptic number.

It is an amenable number.

7525913 is a deficient number, since it is larger than the sum of its proper divisors (66715).

7525913 is a wasteful number, since it uses less digits than its factorization.

7525913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66714.

The product of its digits is 9450, while the sum is 32.

The square root of 7525913 is about 2743.3397529289. The cubic root of 7525913 is about 195.9685584023.

The spelling of 7525913 in words is "seven million, five hundred twenty-five thousand, nine hundred thirteen".