25252778 has 8 divisors (see below), whose sum is σ = 37985760. Its totient is φ = 12590860.

The previous prime is 25252757. The next prime is 25252811. The reversal of 25252778 is 87725252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16868 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (4748220).

Almost surely, 2^25252778 is an apocalyptic number.

25252778 is a deficient number, since it is larger than the sum of its proper divisors (12732982).

25252778 is a wasteful number, since it uses less digits than its factorization.

25252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35532.

The product of its digits is 78400, while the sum is 38.

The square root of 25252778 is about 5025.2142242893. The cubic root of 25252778 is about 293.3839739819.

The spelling of 25252778 in words is "twenty-five million, two hundred fifty-two thousand, seven hundred seventy-eight".