25857133 has 2 divisors, whose sum is σ = 25857134. Its totient is φ = 25857132.

The previous prime is 25857103. The next prime is 25857137. The reversal of 25857133 is 33175852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25623844 + 233289 = 5062^2 + 483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25857133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25857137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12928566 + 12928567.

It is an arithmetic number, because the mean of its divisors is an integer number (12928567).

Almost surely, 2^25857133 is an apocalyptic number.

It is an amenable number.

25857133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25857133 is an equidigital number, since it uses as much as digits as its factorization.

25857133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 25857133 is about 5084.9909537776. The cubic root of 25857133 is about 295.7059907834.

The spelling of 25857133 in words is "twenty-five million, eight hundred fifty-seven thousand, one hundred thirty-three".