25821460 has 48 divisors (see below), whose sum is σ = 62375040. Its totient is φ = 8795520.

The previous prime is 25821451. The next prime is 25821469. The reversal of 25821460 is 6412852.

It is an interprime number because it is at equal distance from previous prime (25821451) and next prime (25821469).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25821469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24831 + ... + 25849.

It is an arithmetic number, because the mean of its divisors is an integer number (1299480).

Almost surely, 2^25821460 is an apocalyptic number.

25821460 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 25821460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31187520).

25821460 is an abundant number, since it is smaller than the sum of its proper divisors (36553580).

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

25821460 is a wasteful number, since it uses less digits than its factorization.

25821460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 25821460 is about 5081.4820672713. The cubic root of 25821460 is about 295.5699409668.

The spelling of 25821460 in words is "twenty-five million, eight hundred twenty-one thousand, four hundred sixty".