25277971 has 2 divisors, whose sum is σ = 25277972. Its totient is φ = 25277970.

The previous prime is 25277969. The next prime is 25278049. The reversal of 25277971 is 17977252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25277971 - 2¹ = 25277969 is a prime.

Together with 25277969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25277071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12638985 + 12638986.

It is an arithmetic number, because the mean of its divisors is an integer number (12638986).

Almost surely, 2^25277971 is an apocalyptic number.

25277971 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277971 is an equidigital number, since it uses as much as digits as its factorization.

25277971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 40.

The square root of 25277971 is about 5027.7202587256. The cubic root of 25277971 is about 293.4815047158.

The spelling of 25277971 in words is "twenty-five million, two hundred seventy-seven thousand, nine hundred seventy-one".