25212249 has 8 divisors (see below), whose sum is σ = 37351520. Its totient is φ = 16808148.

The previous prime is 25212227. The next prime is 25212251. The reversal of 25212249 is 94221252.

It is a happy number.

It is not a de Polignac number, because 25212249 - 2⁹ = 25211737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 933787 = 25212249 / (2 + 5 + 2 + 1 + 2 + 2 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25212289) 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 7 ways as a sum of consecutive naturals, for example, 466867 + ... + 466920.

It is an arithmetic number, because the mean of its divisors is an integer number (4668940).

Almost surely, 2^25212249 is an apocalyptic number.

It is an amenable number.

25212249 is a deficient number, since it is larger than the sum of its proper divisors (12139271).

25212249 is an equidigital number, since it uses as much as digits as its factorization.

25212249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933796 (or 933790 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 25212249 is about 5021.1800405881. The cubic root of 25212249 is about 293.2269361313.

The spelling of 25212249 in words is "twenty-five million, two hundred twelve thousand, two hundred forty-nine".