25871280 has 120 divisors (see below), whose sum is σ = 85424592. Its totient is φ = 6475776.

The previous prime is 25871257. The next prime is 25871303. The reversal of 25871280 is 8217852.

It is an interprime number because it is at equal distance from previous prime (25871257) and next prime (25871303).

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 69174 + ... + 69546.

Almost surely, 2^25871280 is an apocalyptic number.

25871280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25871280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42712296).

25871280 is an abundant number, since it is smaller than the sum of its proper divisors (59553312).

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

25871280 is a wasteful number, since it uses less digits than its factorization.

25871280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 25871280 is about 5086.3818181493. The cubic root of 25871280 is about 295.7599100114.

The spelling of 25871280 in words is "twenty-five million, eight hundred seventy-one thousand, two hundred eighty".