25123487 has 2 divisors, whose sum is σ = 25123488. Its totient is φ = 25123486.

The previous prime is 25123393. The next prime is 25123489. The reversal of 25123487 is 78432152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25123487 is a prime.

Together with 25123489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25123489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561743 + 12561744.

It is an arithmetic number, because the mean of its divisors is an integer number (12561744).

Almost surely, 2^25123487 is an apocalyptic number.

25123487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25123487 is an equidigital number, since it uses as much as digits as its factorization.

25123487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 25123487 is about 5012.3334885061. Note that the first 3 decimals coincide. The cubic root of 25123487 is about 292.8824208769.

The spelling of 25123487 in words is "twenty-five million, one hundred twenty-three thousand, four hundred eighty-seven".