25878519 has 12 divisors (see below), whose sum is σ = 39005616. Its totient is φ = 16502112.

The previous prime is 25878509. The next prime is 25878553. The reversal of 25878519 is 91587852.

It is a happy number.

It is not a de Polignac number, because 25878519 - 2¹⁵ = 25845751 is a prime.

It is a super-2 number, since 2×25878519² = 1339395491266722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25878509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62302 + ... + 62715.

It is an arithmetic number, because the mean of its divisors is an integer number (3250468).

Almost surely, 2^25878519 is an apocalyptic number.

25878519 is a deficient number, since it is larger than the sum of its proper divisors (13127097).

25878519 is a wasteful number, since it uses less digits than its factorization.

25878519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125046 (or 125043 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 25878519 is about 5087.0933744133. The cubic root of 25878519 is about 295.7874928024.

The spelling of 25878519 in words is "twenty-five million, eight hundred seventy-eight thousand, five hundred nineteen".