25671487 has 2 divisors, whose sum is σ = 25671488. Its totient is φ = 25671486.

The previous prime is 25671469. The next prime is 25671491. The reversal of 25671487 is 78417652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25671487 - 2²³ = 17282879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25671497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835743 + 12835744.

It is an arithmetic number, because the mean of its divisors is an integer number (12835744).

Almost surely, 2^25671487 is an apocalyptic number.

25671487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25671487 is an equidigital number, since it uses as much as digits as its factorization.

25671487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 25671487 is about 5066.7037608291. The cubic root of 25671487 is about 294.9965986393.

The spelling of 25671487 in words is "twenty-five million, six hundred seventy-one thousand, four hundred eighty-seven".