25425778 has 32 divisors (see below), whose sum is σ = 47153664. Its totient is φ = 10033152.

The previous prime is 25425773. The next prime is 25425811. The reversal of 25425778 is 87752452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25425778.

It is not an unprimeable number, because it can be changed into a prime (25425773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10050 + ... + 12322.

It is an arithmetic number, because the mean of its divisors is an integer number (1473552).

Almost surely, 2^25425778 is an apocalyptic number.

25425778 is a deficient number, since it is larger than the sum of its proper divisors (21727886).

25425778 is a wasteful number, since it uses less digits than its factorization.

25425778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346.

The product of its digits is 156800, while the sum is 40.

The square root of 25425778 is about 5042.3980406152. The cubic root of 25425778 is about 294.0524147991.

The spelling of 25425778 in words is "twenty-five million, four hundred twenty-five thousand, seven hundred seventy-eight".