25081289 has 2 divisors, whose sum is σ = 25081290. Its totient is φ = 25081288.

The previous prime is 25081279. The next prime is 25081297. The reversal of 25081289 is 98218052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25080064 + 1225 = 5008^2 + 35^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25081289 is a prime.

It is a super-3 number, since 3×25081289³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25081279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12540644 + 12540645.

It is an arithmetic number, because the mean of its divisors is an integer number (12540645).

Almost surely, 2^25081289 is an apocalyptic number.

It is an amenable number.

25081289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25081289 is an equidigital number, since it uses as much as digits as its factorization.

25081289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 25081289 is about 5008.1223028197. The cubic root of 25081289 is about 292.7183515822.

The spelling of 25081289 in words is "twenty-five million, eighty-one thousand, two hundred eighty-nine".