25245978 has 8 divisors (see below), whose sum is σ = 50491968. Its totient is φ = 8415324.

The previous prime is 25245977. The next prime is 25245989. The reversal of 25245978 is 87954252.

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

25245978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25245971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2103826 + ... + 2103837.

It is an arithmetic number, because the mean of its divisors is an integer number (6311496).

Almost surely, 2^25245978 is an apocalyptic number.

25245978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25245978 is a wasteful number, since it uses less digits than its factorization.

25245978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207668.

The product of its digits is 201600, while the sum is 42.

The square root of 25245978 is about 5024.5375906644. The cubic root of 25245978 is about 293.3576377360.

The spelling of 25245978 in words is "twenty-five million, two hundred forty-five thousand, nine hundred seventy-eight".