25385081 has 2 divisors, whose sum is σ = 25385082. Its totient is φ = 25385080.

The previous prime is 25385057. The next prime is 25385099. The reversal of 25385081 is 18058352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 33856 = 5035^2 + 184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25385081 is a prime.

It is a super-2 number, since 2×25385081² = 1288804674753122, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (25385011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12692540 + 12692541.

It is an arithmetic number, because the mean of its divisors is an integer number (12692541).

Almost surely, 2^25385081 is an apocalyptic number.

It is an amenable number.

25385081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25385081 is an equidigital number, since it uses as much as digits as its factorization.

25385081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 25385081 is about 5038.3609437991. The cubic root of 25385081 is about 293.8954423267.

The spelling of 25385081 in words is "twenty-five million, three hundred eighty-five thousand, eighty-one".