25897429 has 2 divisors, whose sum is σ = 25897430. Its totient is φ = 25897428.

The previous prime is 25897397. The next prime is 25897433. The reversal of 25897429 is 92479852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 3713329 = 4710^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 25897429 - 2⁵ = 25897397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25897829) 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, 12948714 + 12948715.

It is an arithmetic number, because the mean of its divisors is an integer number (12948715).

Almost surely, 2^25897429 is an apocalyptic number.

It is an amenable number.

25897429 is a deficient number, since it is larger than the sum of its proper divisors (1).

25897429 is an equidigital number, since it uses as much as digits as its factorization.

25897429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 25897429 is about 5088.9516602145. The cubic root of 25897429 is about 295.8595213917.

The spelling of 25897429 in words is "twenty-five million, eight hundred ninety-seven thousand, four hundred twenty-nine".