25493161 has 2 divisors, whose sum is σ = 25493162. Its totient is φ = 25493160.

The previous prime is 25493123. The next prime is 25493197. The reversal of 25493161 is 16139452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 931225 = 4956^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 25493161 - 2⁷ = 25493033 is a prime.

It is not a weakly prime, because it can be changed into another prime (25493101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746580 + 12746581.

It is an arithmetic number, because the mean of its divisors is an integer number (12746581).

Almost surely, 2^25493161 is an apocalyptic number.

It is an amenable number.

25493161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25493161 is an equidigital number, since it uses as much as digits as its factorization.

25493161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 25493161 is about 5049.0752618673. The cubic root of 25493161 is about 294.3119500352.

The spelling of 25493161 in words is "twenty-five million, four hundred ninety-three thousand, one hundred sixty-one".