25287071 has 2 divisors, whose sum is σ = 25287072. Its totient is φ = 25287070.

The previous prime is 25287047. The next prime is 25287077. The reversal of 25287071 is 17078252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25287071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25287077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12643535 + 12643536.

It is an arithmetic number, because the mean of its divisors is an integer number (12643536).

Almost surely, 2^25287071 is an apocalyptic number.

25287071 is a deficient number, since it is larger than the sum of its proper divisors (1).

25287071 is an equidigital number, since it uses as much as digits as its factorization.

25287071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 25287071 is about 5028.6251600214. The cubic root of 25287071 is about 293.5167180019.

The spelling of 25287071 in words is "twenty-five million, two hundred eighty-seven thousand, seventy-one".