25299161 has 2 divisors, whose sum is σ = 25299162. Its totient is φ = 25299160.

The previous prime is 25299143. The next prime is 25299167. The reversal of 25299161 is 16199252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 9339136 = 3995^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 25299161 - 2⁶ = 25299097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25299167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649580 + 12649581.

It is an arithmetic number, because the mean of its divisors is an integer number (12649581).

Almost surely, 2^25299161 is an apocalyptic number.

It is an amenable number.

25299161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25299161 is an equidigital number, since it uses as much as digits as its factorization.

25299161 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 25299161 is about 5029.8271342065. The cubic root of 25299161 is about 293.5634883024.

Subtracting from 25299161 its reverse (16199252), we obtain a palindrome (9099909).

The spelling of 25299161 in words is "twenty-five million, two hundred ninety-nine thousand, one hundred sixty-one".