2149812 has 72 divisors (see below), whose sum is σ = 6552000. Its totient is φ = 580608.

The previous prime is 2149789. The next prime is 2149813. The reversal of 2149812 is 2189412.

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 (2149813) 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, 4564 + ... + 5012.

It is an arithmetic number, because the mean of its divisors is an integer number (91000).

2^2149812 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 2149812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3276000).

2149812 is an abundant number, since it is smaller than the sum of its proper divisors (4402188).

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

2149812 is a wasteful number, since it uses less digits than its factorization.

2149812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 480 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 2149812 is about 1466.2237209921. The cubic root of 2149812 is about 129.0625260256.

The spelling of 2149812 in words is "two million, one hundred forty-nine thousand, eight hundred twelve".