25492729 has 2 divisors, whose sum is σ = 25492730. Its totient is φ = 25492728.

The previous prime is 25492721. The next prime is 25492759. The reversal of 25492729 is 92729452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24482704 + 1010025 = 4948^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 25492729 - 2³ = 25492721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 25492691 and 25492700.

It is not a weakly prime, because it can be changed into another prime (25492721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746364 + 12746365.

It is an arithmetic number, because the mean of its divisors is an integer number (12746365).

Almost surely, 2^25492729 is an apocalyptic number.

It is an amenable number.

25492729 is a deficient number, since it is larger than the sum of its proper divisors (1).

25492729 is an equidigital number, since it uses as much as digits as its factorization.

25492729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 25492729 is about 5049.0324815751. The cubic root of 25492729 is about 294.3102875831.

The spelling of 25492729 in words is "twenty-five million, four hundred ninety-two thousand, seven hundred twenty-nine".