25409291 has 2 divisors, whose sum is σ = 25409292. Its totient is φ = 25409290.

The previous prime is 25409261. The next prime is 25409311. The reversal of 25409291 is 19290452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25409291 - 2¹⁴ = 25392907 is a prime.

It is not a weakly prime, because it can be changed into another prime (25409221) 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, 12704645 + 12704646.

It is an arithmetic number, because the mean of its divisors is an integer number (12704646).

Almost surely, 2^25409291 is an apocalyptic number.

25409291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25409291 is an equidigital number, since it uses as much as digits as its factorization.

25409291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 25409291 is about 5040.7629382862. The cubic root of 25409291 is about 293.9888429598.

The spelling of 25409291 in words is "twenty-five million, four hundred nine thousand, two hundred ninety-one".