25481399 has 2 divisors, whose sum is σ = 25481400. Its totient is φ = 25481398.

The previous prime is 25481369. The next prime is 25481429. The reversal of 25481399 is 99318452.

It is a balanced prime because it is at equal distance from previous prime (25481369) and next prime (25481429).

It is a cyclic number.

It is not a de Polignac number, because 25481399 - 2⁸ = 25481143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25481369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12740699 + 12740700.

It is an arithmetic number, because the mean of its divisors is an integer number (12740700).

Almost surely, 2^25481399 is an apocalyptic number.

25481399 is a deficient number, since it is larger than the sum of its proper divisors (1).

25481399 is an equidigital number, since it uses as much as digits as its factorization.

25481399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 25481399 is about 5047.9103597429. The cubic root of 25481399 is about 294.2666799897.

The spelling of 25481399 in words is "twenty-five million, four hundred eighty-one thousand, three hundred ninety-nine".