2525309 has 4 divisors (see below), whose sum is σ = 2658240. Its totient is φ = 2392380.

The previous prime is 2525293. The next prime is 2525323. The reversal of 2525309 is 9035252.

2525309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2525309 - 2⁴ = 2525293 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2525329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66437 + ... + 66474.

It is an arithmetic number, because the mean of its divisors is an integer number (664560).

2^2525309 is an apocalyptic number.

It is an amenable number.

2525309 is a deficient number, since it is larger than the sum of its proper divisors (132931).

2525309 is a wasteful number, since it uses less digits than its factorization.

2525309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132930.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 2525309 is about 1589.1220846744. The cubic root of 2525309 is about 136.1773385821.

The spelling of 2525309 in words is "two million, five hundred twenty-five thousand, three hundred nine".