25724129 has 2 divisors, whose sum is σ = 25724130. Its totient is φ = 25724128.

The previous prime is 25724123. The next prime is 25724161. The reversal of 25724129 is 92142752.

It is an a-pointer prime, because the next prime (25724161) can be obtained adding 25724129 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13890529 + 11833600 = 3727^2 + 3440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25724129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25724095 and 25724104.

It is not a weakly prime, because it can be changed into another prime (25724123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862064 + 12862065.

It is an arithmetic number, because the mean of its divisors is an integer number (12862065).

Almost surely, 2^25724129 is an apocalyptic number.

It is an amenable number.

25724129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25724129 is an equidigital number, since it uses as much as digits as its factorization.

25724129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 25724129 is about 5071.8959965678. The cubic root of 25724129 is about 295.1981011634.

The spelling of 25724129 in words is "twenty-five million, seven hundred twenty-four thousand, one hundred twenty-nine".