25261919 has 2 divisors, whose sum is σ = 25261920. Its totient is φ = 25261918.

The previous prime is 25261897. The next prime is 25261927. The reversal of 25261919 is 91916252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25261919 - 2¹² = 25257823 is a prime.

It is a super-2 number, since 2×25261919² = 1276329103125122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25261969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12630959 + 12630960.

It is an arithmetic number, because the mean of its divisors is an integer number (12630960).

Almost surely, 2^25261919 is an apocalyptic number.

25261919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25261919 is an equidigital number, since it uses as much as digits as its factorization.

25261919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 25261919 is about 5026.1236554625. The cubic root of 25261919 is about 293.4193694195.

The spelling of 25261919 in words is "twenty-five million, two hundred sixty-one thousand, nine hundred nineteen".