2131784 has 16 divisors (see below), whose sum is σ = 4012800. Its totient is φ = 1061712.

The previous prime is 2131771. The next prime is 2131793. The reversal of 2131784 is 4871312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (250800).

2^2131784 is an apocalyptic number.

It is an amenable number.

2131784 is a deficient number, since it is larger than the sum of its proper divisors (1881016).

2131784 is a wasteful number, since it uses less digits than its factorization.

2131784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1048 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 2131784 is about 1460.0630123389. The cubic root of 2131784 is about 128.7007465483.

The spelling of 2131784 in words is "two million, one hundred thirty-one thousand, seven hundred eighty-four".