25442849 has 2 divisors, whose sum is σ = 25442850. Its totient is φ = 25442848.

The previous prime is 25442821. The next prime is 25442869. The reversal of 25442849 is 94824452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 692224 = 4975^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442849 - 2²⁰ = 24394273 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25442869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721424 + 12721425.

It is an arithmetic number, because the mean of its divisors is an integer number (12721425).

Almost surely, 2^25442849 is an apocalyptic number.

It is an amenable number.

25442849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442849 is an equidigital number, since it uses as much as digits as its factorization.

25442849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 38.

The square root of 25442849 is about 5044.0905027567. The cubic root of 25442849 is about 294.1182095181.

The spelling of 25442849 in words is "twenty-five million, four hundred forty-two thousand, eight hundred forty-nine".