25340257 has 2 divisors, whose sum is σ = 25340258. Its totient is φ = 25340256.

The previous prime is 25340233. The next prime is 25340261. The reversal of 25340257 is 75204352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17505856 + 7834401 = 4184^2 + 2799^2 .

It is a cyclic number.

It is not a de Polignac number, because 25340257 - 2¹⁹ = 24815969 is a prime.

It is not a weakly prime, because it can be changed into another prime (25340267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12670128 + 12670129.

It is an arithmetic number, because the mean of its divisors is an integer number (12670129).

Almost surely, 2^25340257 is an apocalyptic number.

It is an amenable number.

25340257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25340257 is an equidigital number, since it uses as much as digits as its factorization.

25340257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25340257 is about 5033.9107063992. The cubic root of 25340257 is about 293.7223573204.

The spelling of 25340257 in words is "twenty-five million, three hundred forty thousand, two hundred fifty-seven".