13243525 has 6 divisors (see below), whose sum is σ = 16422002. Its totient is φ = 10594800.

The previous prime is 13243471. The next prime is 13243537. The reversal of 13243525 is 52534231.

It can be written as a sum of positive squares in 3 ways, for example, as 1147041 + 12096484 = 1071^2 + 3478^2 .

It is not a de Polignac number, because 13243525 - 2¹¹ = 13241477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 529741 = 13243525 / (1 + 3 + 2 + 4 + 3 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13243525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264846 + ... + 264895.

Almost surely, 2^13243525 is an apocalyptic number.

It is an amenable number.

13243525 is a deficient number, since it is larger than the sum of its proper divisors (3178477).

13243525 is an equidigital number, since it uses as much as digits as its factorization.

13243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529751 (or 529746 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 13243525 is about 3639.1654263031. The cubic root of 13243525 is about 236.5926226964.

Adding to 13243525 its reverse (52534231), we get a palindrome (65777756).

The spelling of 13243525 in words is "thirteen million, two hundred forty-three thousand, five hundred twenty-five".