25603157 has 2 divisors, whose sum is σ = 25603158. Its totient is φ = 25603156.

The previous prime is 25603133. The next prime is 25603169. The reversal of 25603157 is 75130652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24196561 + 1406596 = 4919^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 25603157 - 2¹⁴ = 25586773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25603177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12801578 + 12801579.

It is an arithmetic number, because the mean of its divisors is an integer number (12801579).

Almost surely, 2^25603157 is an apocalyptic number.

It is an amenable number.

25603157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25603157 is an equidigital number, since it uses as much as digits as its factorization.

25603157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 25603157 is about 5059.9562251071. The cubic root of 25603157 is about 294.7346344843.

The spelling of 25603157 in words is "twenty-five million, six hundred three thousand, one hundred fifty-seven".