25783249 has 4 divisors (see below), whose sum is σ = 25968880. Its totient is φ = 25597620.

The previous prime is 25783243. The next prime is 25783259. The reversal of 25783249 is 94238752.

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 25783249 - 2⁵ = 25783217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25783243) 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 in 3 ways as a sum of consecutive naturals, for example, 92607 + ... + 92884.

It is an arithmetic number, because the mean of its divisors is an integer number (6492220).

Almost surely, 2^25783249 is an apocalyptic number.

It is an amenable number.

25783249 is a deficient number, since it is larger than the sum of its proper divisors (185631).

25783249 is a wasteful number, since it uses less digits than its factorization.

25783249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185630.

The product of its digits is 120960, while the sum is 40.

The square root of 25783249 is about 5077.7208469942. The cubic root of 25783249 is about 295.4240726513.

The spelling of 25783249 in words is "twenty-five million, seven hundred eighty-three thousand, two hundred forty-nine".