25261897 has 2 divisors, whose sum is σ = 25261898. Its totient is φ = 25261896.

The previous prime is 25261891. The next prime is 25261919. The reversal of 25261897 is 79816252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23270976 + 1990921 = 4824^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 25261897 - 2²³ = 16873289 is a prime.

It is not a weakly prime, because it can be changed into another prime (25261891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12630948 + 12630949.

It is an arithmetic number, because the mean of its divisors is an integer number (12630949).

Almost surely, 2^25261897 is an apocalyptic number.

It is an amenable number.

25261897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25261897 is an equidigital number, since it uses as much as digits as its factorization.

25261897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 25261897 is about 5026.1214668967. The cubic root of 25261897 is about 293.4192842422.

The spelling of 25261897 in words is "twenty-five million, two hundred sixty-one thousand, eight hundred ninety-seven".