15125609 has 2 divisors, whose sum is σ = 15125610. Its totient is φ = 15125608.

The previous prime is 15125599. The next prime is 15125611. The reversal of 15125609 is 90652151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 133225 = 3872^2 + 365^2 .

It is an emirp because it is prime and its reverse (90652151) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15125609 is a prime.

Together with 15125611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15125689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7562804 + 7562805.

It is an arithmetic number, because the mean of its divisors is an integer number (7562805).

Almost surely, 2^15125609 is an apocalyptic number.

It is an amenable number.

15125609 is a deficient number, since it is larger than the sum of its proper divisors (1).

15125609 is an equidigital number, since it uses as much as digits as its factorization.

15125609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 15125609 is about 3889.1655917433. The cubic root of 15125609 is about 247.3076913105.

The spelling of 15125609 in words is "fifteen million, one hundred twenty-five thousand, six hundred nine".