2501856 has 144 divisors (see below), whose sum is σ = 8727264. Its totient is φ = 663552.

The previous prime is 2501843. The next prime is 2501881. The reversal of 2501856 is 6581052.

It is a tau number, because it is divible by the number of its divisors (144).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34236 + ... + 34308.

It is an arithmetic number, because the mean of its divisors is an integer number (60606).

2^2501856 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 2501856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4363632).

2501856 is an abundant number, since it is smaller than the sum of its proper divisors (6225408).

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

2501856 is a wasteful number, since it uses less digits than its factorization.

2501856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2501856 is about 1581.7256399262. The cubic root of 2501856 is about 135.7544589156.

The spelling of 2501856 in words is "two million, five hundred one thousand, eight hundred fifty-six".