25438487 has 2 divisors, whose sum is σ = 25438488. Its totient is φ = 25438486.

The previous prime is 25438471. The next prime is 25438513. The reversal of 25438487 is 78483452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25438487 - 2⁴ = 25438471 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 (25438417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12719243 + 12719244.

It is an arithmetic number, because the mean of its divisors is an integer number (12719244).

Almost surely, 2^25438487 is an apocalyptic number.

25438487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25438487 is an equidigital number, since it uses as much as digits as its factorization.

25438487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 41.

The square root of 25438487 is about 5043.6580970561. The cubic root of 25438487 is about 294.1014003818.

The spelling of 25438487 in words is "twenty-five million, four hundred thirty-eight thousand, four hundred eighty-seven".