25878241 has 2 divisors, whose sum is σ = 25878242. Its totient is φ = 25878240.

The previous prime is 25878239. The next prime is 25878253. The reversal of 25878241 is 14287852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23804641 + 2073600 = 4879^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 25878241 - 2¹ = 25878239 is a prime.

Together with 25878239, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25878241.

It is not a weakly prime, because it can be changed into another prime (25878221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939120 + 12939121.

It is an arithmetic number, because the mean of its divisors is an integer number (12939121).

Almost surely, 2^25878241 is an apocalyptic number.

It is an amenable number.

25878241 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878241 is an equidigital number, since it uses as much as digits as its factorization.

25878241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 37.

The square root of 25878241 is about 5087.0660502887. The cubic root of 25878241 is about 295.7864336329.

The spelling of 25878241 in words is "twenty-five million, eight hundred seventy-eight thousand, two hundred forty-one".