12525391 has 4 divisors (see below), whose sum is σ = 12554752. Its totient is φ = 12496032.

The previous prime is 12525367. The next prime is 12525421. The reversal of 12525391 is 19352521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12525391 - 2¹³ = 12517199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14031 + ... + 14896.

It is an arithmetic number, because the mean of its divisors is an integer number (3138688).

Almost surely, 2^12525391 is an apocalyptic number.

12525391 is a deficient number, since it is larger than the sum of its proper divisors (29361).

12525391 is an equidigital number, since it uses as much as digits as its factorization.

12525391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29360.

The product of its digits is 2700, while the sum is 28.

The square root of 12525391 is about 3539.1229139435. The cubic root of 12525391 is about 232.2364748452.

The spelling of 12525391 in words is "twelve million, five hundred twenty-five thousand, three hundred ninety-one".