25557101 has 2 divisors, whose sum is σ = 25557102. Its totient is φ = 25557100.

The previous prime is 25557079. The next prime is 25557127. The reversal of 25557101 is 10175552.

It is a happy number.

It is an a-pointer prime, because the next prime (25557127) can be obtained adding 25557101 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22335076 + 3222025 = 4726^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 25557101 - 2¹⁴ = 25540717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25554101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778550 + 12778551.

It is an arithmetic number, because the mean of its divisors is an integer number (12778551).

Almost surely, 2^25557101 is an apocalyptic number.

It is an amenable number.

25557101 is a deficient number, since it is larger than the sum of its proper divisors (1).

25557101 is an equidigital number, since it uses as much as digits as its factorization.

25557101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 25557101 is about 5055.4031491069. The cubic root of 25557101 is about 294.5578015284.

The spelling of 25557101 in words is "twenty-five million, five hundred fifty-seven thousand, one hundred one".