25205249 has 4 divisors (see below), whose sum is σ = 25238064. Its totient is φ = 25172436.

The previous prime is 25205239. The next prime is 25205281. The reversal of 25205249 is 94250252.

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 a de Polignac number, because none of the positive numbers 2^k-25205249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25205209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15227 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (6309516).

Almost surely, 2^25205249 is an apocalyptic number.

It is an amenable number.

25205249 is a deficient number, since it is larger than the sum of its proper divisors (32815).

25205249 is an equidigital number, since it uses as much as digits as its factorization.

25205249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32814.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 25205249 is about 5020.4829448968. The cubic root of 25205249 is about 293.1997961679.

The spelling of 25205249 in words is "twenty-five million, two hundred five thousand, two hundred forty-nine".