2091724 has 12 divisors (see below), whose sum is σ = 3696784. Its totient is φ = 1035504.

The previous prime is 2091709. The next prime is 2091737. The reversal of 2091724 is 4271902.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127 + ... + 2950.

2^2091724 is an apocalyptic number.

It is an amenable number.

2091724 is a deficient number, since it is larger than the sum of its proper divisors (1605060).

2091724 is a wasteful number, since it uses less digits than its factorization.

2091724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184 (or 5182 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2091724 is about 1446.2793644383. The cubic root of 2091724 is about 127.8894716432.

The spelling of 2091724 in words is "two million, ninety-one thousand, seven hundred twenty-four".