25191427 has 2 divisors, whose sum is σ = 25191428. Its totient is φ = 25191426.

The previous prime is 25191409. The next prime is 25191457. The reversal of 25191427 is 72419152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25191427 - 2¹¹ = 25189379 is a prime.

It is not a weakly prime, because it can be changed into another prime (25191457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12595713 + 12595714.

It is an arithmetic number, because the mean of its divisors is an integer number (12595714).

Almost surely, 2^25191427 is an apocalyptic number.

25191427 is a deficient number, since it is larger than the sum of its proper divisors (1).

25191427 is an equidigital number, since it uses as much as digits as its factorization.

25191427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 25191427 is about 5019.1061953300. The cubic root of 25191427 is about 293.1461916112.

The spelling of 25191427 in words is "twenty-five million, one hundred ninety-one thousand, four hundred twenty-seven".