25538291 has 2 divisors, whose sum is σ = 25538292. Its totient is φ = 25538290.

The previous prime is 25538287. The next prime is 25538297. The reversal of 25538291 is 19283552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25538291 - 2² = 25538287 is a prime.

It is not a weakly prime, because it can be changed into another prime (25538297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769145 + 12769146.

It is an arithmetic number, because the mean of its divisors is an integer number (12769146).

Almost surely, 2^25538291 is an apocalyptic number.

25538291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25538291 is an equidigital number, since it uses as much as digits as its factorization.

25538291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 25538291 is about 5053.5424209162. The cubic root of 25538291 is about 294.4855190461.

The spelling of 25538291 in words is "twenty-five million, five hundred thirty-eight thousand, two hundred ninety-one".