25271971 has 2 divisors, whose sum is σ = 25271972. Its totient is φ = 25271970.

The previous prime is 25271951. The next prime is 25271989. The reversal of 25271971 is 17917252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25271971 - 2¹³ = 25263779 is a prime.

It is not a weakly prime, because it can be changed into another prime (25271941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12635985 + 12635986.

It is an arithmetic number, because the mean of its divisors is an integer number (12635986).

Almost surely, 2^25271971 is an apocalyptic number.

25271971 is a deficient number, since it is larger than the sum of its proper divisors (1).

25271971 is an equidigital number, since it uses as much as digits as its factorization.

25271971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 34.

The square root of 25271971 is about 5027.1235314044. The cubic root of 25271971 is about 293.4582825412.

The spelling of 25271971 in words is "twenty-five million, two hundred seventy-one thousand, nine hundred seventy-one".