2103812 has 6 divisors (see below), whose sum is σ = 3681678. Its totient is φ = 1051904.

The previous prime is 2103811. The next prime is 2103817. The reversal of 2103812 is 2183012.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 188356 = 1384^2 + 434^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2103811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262973 + ... + 262980.

It is an arithmetic number, because the mean of its divisors is an integer number (613613).

2^2103812 is an apocalyptic number.

It is an amenable number.

2103812 is a deficient number, since it is larger than the sum of its proper divisors (1577866).

2103812 is a wasteful number, since it uses less digits than its factorization.

2103812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525957 (or 525955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2103812 is about 1450.4523432364. The cubic root of 2103812 is about 128.1353548641.

Adding to 2103812 its reverse (2183012), we get a palindrome (4286824).

The spelling of 2103812 in words is "two million, one hundred three thousand, eight hundred twelve".