25821048 has 64 divisors (see below), whose sum is σ = 71953920. Its totient is φ = 7654400.

The previous prime is 25821043. The next prime is 25821053. The reversal of 25821048 is 84012852.

It is an interprime number because it is at equal distance from previous prime (25821043) and next prime (25821053).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25821043) 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, 11368 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (1124280).

Almost surely, 2^25821048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25821048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35976960).

25821048 is an abundant number, since it is smaller than the sum of its proper divisors (46132872).

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

25821048 is a wasteful number, since it uses less digits than its factorization.

25821048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148 (or 2144 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 25821048 is about 5081.4415277557. The cubic root of 25821048 is about 295.5683689480.

The spelling of 25821048 in words is "twenty-five million, eight hundred twenty-one thousand, forty-eight".