25231249 has 2 divisors, whose sum is σ = 25231250. Its totient is φ = 25231248.

The previous prime is 25231231. The next prime is 25231279. The reversal of 25231249 is 94213252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21790224 + 3441025 = 4668^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 25231249 - 2⁷ = 25231121 is a prime.

It is a super-2 number, since 2×25231249² = 1273231852200002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25231279) 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 as a sum of consecutive naturals, namely, 12615624 + 12615625.

It is an arithmetic number, because the mean of its divisors is an integer number (12615625).

Almost surely, 2^25231249 is an apocalyptic number.

It is an amenable number.

25231249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25231249 is an equidigital number, since it uses as much as digits as its factorization.

25231249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 25231249 is about 5023.0716698052. The cubic root of 25231249 is about 293.3005764328.

The spelling of 25231249 in words is "twenty-five million, two hundred thirty-one thousand, two hundred forty-nine".