15252509 has 2 divisors, whose sum is σ = 15252510. Its totient is φ = 15252508.

The previous prime is 15252467. The next prime is 15252511. The reversal of 15252509 is 90525251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 120409 = 3890^2 + 347^2 .

It is an emirp because it is prime and its reverse (90525251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15252509 - 2⁸ = 15252253 is a prime.

Together with 15252511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15252539) 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, 7626254 + 7626255.

It is an arithmetic number, because the mean of its divisors is an integer number (7626255).

Almost surely, 2^15252509 is an apocalyptic number.

It is an amenable number.

15252509 is a deficient number, since it is larger than the sum of its proper divisors (1).

15252509 is an equidigital number, since it uses as much as digits as its factorization.

15252509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 15252509 is about 3905.4460692730. The cubic root of 15252509 is about 247.9973822564.

The spelling of 15252509 in words is "fifteen million, two hundred fifty-two thousand, five hundred nine".