25891429 has 2 divisors, whose sum is σ = 25891430. Its totient is φ = 25891428.

The previous prime is 25891361. The next prime is 25891441. The reversal of 25891429 is 92419852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14822500 + 11068929 = 3850^2 + 3327^2 .

It is a cyclic number.

It is not a de Polignac number, because 25891429 - 2⁷ = 25891301 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25891391 and 25891400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25897429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12945714 + 12945715.

It is an arithmetic number, because the mean of its divisors is an integer number (12945715).

Almost surely, 2^25891429 is an apocalyptic number.

It is an amenable number.

25891429 is a deficient number, since it is larger than the sum of its proper divisors (1).

25891429 is an equidigital number, since it uses as much as digits as its factorization.

25891429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 25891429 is about 5088.3621136865. The cubic root of 25891429 is about 295.8366710638.

The spelling of 25891429 in words is "twenty-five million, eight hundred ninety-one thousand, four hundred twenty-nine".