25049971 has 2 divisors, whose sum is σ = 25049972. Its totient is φ = 25049970.

The previous prime is 25049963. The next prime is 25049977. The reversal of 25049971 is 17994052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25049971 - 2³ = 25049963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25049971.

It is not a weakly prime, because it can be changed into another prime (25049977) 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, 12524985 + 12524986.

It is an arithmetic number, because the mean of its divisors is an integer number (12524986).

Almost surely, 2^25049971 is an apocalyptic number.

25049971 is a deficient number, since it is larger than the sum of its proper divisors (1).

25049971 is an equidigital number, since it uses as much as digits as its factorization.

25049971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 25049971 is about 5004.9946053917. The cubic root of 25049971 is about 292.5964656135.

The spelling of 25049971 in words is "twenty-five million, forty-nine thousand, nine hundred seventy-one".