25271657 has 2 divisors, whose sum is σ = 25271658. Its totient is φ = 25271656.

The previous prime is 25271633. The next prime is 25271671. The reversal of 25271657 is 75617252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24167056 + 1104601 = 4916^2 + 1051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25271657 is a prime.

It is not a weakly prime, because it can be changed into another prime (25271627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12635828 + 12635829.

It is an arithmetic number, because the mean of its divisors is an integer number (12635829).

Almost surely, 2^25271657 is an apocalyptic number.

It is an amenable number.

25271657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25271657 is an equidigital number, since it uses as much as digits as its factorization.

25271657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 35.

The square root of 25271657 is about 5027.0923007241. The cubic root of 25271657 is about 293.4570671462.

Subtracting 25271657 from its reverse (75617252), we obtain a triangular number (50345595 = T₁₀₀₃₄).

The spelling of 25271657 in words is "twenty-five million, two hundred seventy-one thousand, six hundred fifty-seven".