2125816 has 96 divisors (see below), whose sum is σ = 5540400. Its totient is φ = 752640.

The previous prime is 2125813. The next prime is 2125819. The reversal of 2125816 is 6185212.

It is an interprime number because it is at equal distance from previous prime (2125813) and next prime (2125819).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73290 + ... + 73318.

2^2125816 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 2125816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2770200).

2125816 is an abundant number, since it is smaller than the sum of its proper divisors (3414584).

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

2125816 is a wasteful number, since it uses less digits than its factorization.

2125816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 66 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 2125816 is about 1458.0178325384. The cubic root of 2125816 is about 128.5805336291.

The spelling of 2125816 in words is "two million, one hundred twenty-five thousand, eight hundred sixteen".