25054978 has 8 divisors (see below), whose sum is σ = 40473468. Its totient is φ = 11563824.

The previous prime is 25054963. The next prime is 25054979. The reversal of 25054978 is 87945052.

It can be written as a sum of positive squares in 2 ways, for example, as 24472809 + 582169 = 4947^2 + 763^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 25054978.

It is not an unprimeable number, because it can be changed into a prime (25054979) 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, 481801 + ... + 481852.

Almost surely, 2^25054978 is an apocalyptic number.

25054978 is a deficient number, since it is larger than the sum of its proper divisors (15418490).

25054978 is a wasteful number, since it uses less digits than its factorization.

25054978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963668.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25054978 is about 5005.4947807385. The cubic root of 25054978 is about 292.6159590878.

The spelling of 25054978 in words is "twenty-five million, fifty-four thousand, nine hundred seventy-eight".