25878747 has 4 divisors (see below), whose sum is σ = 34505000. Its totient is φ = 17252496.

The previous prime is 25878739. The next prime is 25878751. The reversal of 25878747 is 74787852.

It is a happy number.

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

It is not a de Polignac number, because 25878747 - 2³ = 25878739 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25878696 and 25878705.

It is not an unprimeable number, because it can be changed into a prime (25878737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4313122 + ... + 4313127.

It is an arithmetic number, because the mean of its divisors is an integer number (8626250).

Almost surely, 2^25878747 is an apocalyptic number.

25878747 is a deficient number, since it is larger than the sum of its proper divisors (8626253).

25878747 is an equidigital number, since it uses as much as digits as its factorization.

25878747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626252.

The product of its digits is 878080, while the sum is 48.

The square root of 25878747 is about 5087.1157840175. The cubic root of 25878747 is about 295.7883614682.

The spelling of 25878747 in words is "twenty-five million, eight hundred seventy-eight thousand, seven hundred forty-seven".