25071251 has 2 divisors, whose sum is σ = 25071252. Its totient is φ = 25071250.

The previous prime is 25071223. The next prime is 25071271. The reversal of 25071251 is 15217052.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25071251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25071271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535625 + 12535626.

It is an arithmetic number, because the mean of its divisors is an integer number (12535626).

Almost surely, 2^25071251 is an apocalyptic number.

25071251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25071251 is an equidigital number, since it uses as much as digits as its factorization.

25071251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 25071251 is about 5007.1200305165. The cubic root of 25071251 is about 292.6792959222.

The spelling of 25071251 in words is "twenty-five million, seventy-one thousand, two hundred fifty-one".