25071161 has 2 divisors, whose sum is σ = 25071162. Its totient is φ = 25071160.

The previous prime is 25071143. The next prime is 25071169. The reversal of 25071161 is 16117052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 913936 = 4915^2 + 956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25071161 is a prime.

It is a super-2 number, since 2×25071161² = 1257126227775842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25071169) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535580 + 12535581.

It is an arithmetic number, because the mean of its divisors is an integer number (12535581).

Almost surely, 2^25071161 is an apocalyptic number.

It is an amenable number.

25071161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25071161 is an equidigital number, since it uses as much as digits as its factorization.

25071161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 25071161 is about 5007.1110433063. Note that the first 3 decimals coincide. The cubic root of 25071161 is about 292.6789457047.

The spelling of 25071161 in words is "twenty-five million, seventy-one thousand, one hundred sixty-one".