2105724 has 24 divisors (see below), whose sum is σ = 4936960. Its totient is φ = 698544.

The previous prime is 2105717. The next prime is 2105729. The reversal of 2105724 is 4275012.

It is a self number, because there is not a number n which added to its sum of digits gives 2105724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4317 + ... + 4779.

2^2105724 is an apocalyptic number.

It is an amenable number.

2105724 is an abundant number, since it is smaller than the sum of its proper divisors (2831236).

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

2105724 is a wasteful number, since it uses less digits than its factorization.

2105724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 2105724 is about 1451.1112982814. Note that the first 3 decimals coincide. The cubic root of 2105724 is about 128.1741607106.

The spelling of 2105724 in words is "two million, one hundred five thousand, seven hundred twenty-four".