25321157 has 2 divisors, whose sum is σ = 25321158. Its totient is φ = 25321156.

The previous prime is 25321151. The next prime is 25321181. The reversal of 25321157 is 75112352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 261121 = 5006^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25321157 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 (25321151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660578 + 12660579.

It is an arithmetic number, because the mean of its divisors is an integer number (12660579).

Almost surely, 2^25321157 is an apocalyptic number.

It is an amenable number.

25321157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321157 is an equidigital number, since it uses as much as digits as its factorization.

25321157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 26.

The square root of 25321157 is about 5032.0132154040. The cubic root of 25321157 is about 293.6485418741.

The spelling of 25321157 in words is "twenty-five million, three hundred twenty-one thousand, one hundred fifty-seven".