25138487 has 4 divisors (see below), whose sum is σ = 27423816. Its totient is φ = 22853160.

The previous prime is 25138481. The next prime is 25138493. The reversal of 25138487 is 78483152.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25138481) and next prime (25138493).

It is not a de Polignac number, because 25138487 - 2¹² = 25134391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25138487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142648 + ... + 1142669.

It is an arithmetic number, because the mean of its divisors is an integer number (6855954).

Almost surely, 2^25138487 is an apocalyptic number.

25138487 is a deficient number, since it is larger than the sum of its proper divisors (2285329).

25138487 is a wasteful number, since it uses less digits than its factorization.

25138487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285328.

The product of its digits is 53760, while the sum is 38.

The square root of 25138487 is about 5013.8295742875. The cubic root of 25138487 is about 292.9406978493.

The spelling of 25138487 in words is "twenty-five million, one hundred thirty-eight thousand, four hundred eighty-seven".