25219487 has 4 divisors (see below), whose sum is σ = 25243776. Its totient is φ = 25195200.

The previous prime is 25219463. The next prime is 25219499. The reversal of 25219487 is 78491252.

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

It is a cyclic number.

It is not a de Polignac number, because 25219487 - 2²⁴ = 8442271 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 25219487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25219417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10514 + ... + 12687.

It is an arithmetic number, because the mean of its divisors is an integer number (6310944).

Almost surely, 2^25219487 is an apocalyptic number.

25219487 is a deficient number, since it is larger than the sum of its proper divisors (24289).

25219487 is a wasteful number, since it uses less digits than its factorization.

25219487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24288.

The product of its digits is 40320, while the sum is 38.

The square root of 25219487 is about 5021.9007357772. The cubic root of 25219487 is about 293.2549935714.

The spelling of 25219487 in words is "twenty-five million, two hundred nineteen thousand, four hundred eighty-seven".