2125818 has 16 divisors (see below), whose sum is σ = 4724160. Its totient is φ = 708588.

The previous prime is 2125813. The next prime is 2125819. The reversal of 2125818 is 8185212.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a junction number, because it is equal to n+sod(n) for n = 2125791 and 2125800.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19630 + ... + 19737.

It is an arithmetic number, because the mean of its divisors is an integer number (295260).

2^2125818 is an apocalyptic number.

2125818 is an abundant number, since it is smaller than the sum of its proper divisors (2598342).

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

2125818 is a wasteful number, since it uses less digits than its factorization.

2125818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39378 (or 39372 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2125818 is about 1458.0185184009. The cubic root of 2125818 is about 128.5805739526.

The spelling of 2125818 in words is "two million, one hundred twenty-five thousand, eight hundred eighteen".