25491371 has 2 divisors, whose sum is σ = 25491372. Its totient is φ = 25491370.

The previous prime is 25491329. The next prime is 25491397. The reversal of 25491371 is 17319452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25491371 - 2¹⁰ = 25490347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25491311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12745685 + 12745686.

It is an arithmetic number, because the mean of its divisors is an integer number (12745686).

Almost surely, 2^25491371 is an apocalyptic number.

25491371 is a deficient number, since it is larger than the sum of its proper divisors (1).

25491371 is an equidigital number, since it uses as much as digits as its factorization.

25491371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 25491371 is about 5048.8979985736. The cubic root of 25491371 is about 294.3050615116.

The spelling of 25491371 in words is "twenty-five million, four hundred ninety-one thousand, three hundred seventy-one".