25123081 has 2 divisors, whose sum is σ = 25123082. Its totient is φ = 25123080.

The previous prime is 25123079. The next prime is 25123099. The reversal of 25123081 is 18032152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 173056 = 4995^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 25123081 - 2¹ = 25123079 is a prime.

It is a super-2 number, since 2×25123081² = 1262338397865122, which contains 22 as substring.

Together with 25123079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25123001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561540 + 12561541.

It is an arithmetic number, because the mean of its divisors is an integer number (12561541).

Almost surely, 2^25123081 is an apocalyptic number.

It is an amenable number.

25123081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25123081 is an equidigital number, since it uses as much as digits as its factorization.

25123081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 25123081 is about 5012.2929882440. The cubic root of 25123081 is about 292.8808431911.

It can be divided in two parts, 251 and 23081, that added together give a palindrome (23332).

The spelling of 25123081 in words is "twenty-five million, one hundred twenty-three thousand, eighty-one".