1812723 has 16 divisors (see below), whose sum is σ = 2660736. Its totient is φ = 1088640.

The previous prime is 1812721. The next prime is 1812749. The reversal of 1812723 is 3272181.

It is not a de Polignac number, because 1812723 - 2¹ = 1812721 is a prime.

It is an Ulam number.

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

1812723 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1812693 and 1812702.

It is not an unprimeable number, because it can be changed into a prime (1812721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5211 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (166296).

2^1812723 is an apocalyptic number.

1812723 is a deficient number, since it is larger than the sum of its proper divisors (848013).

1812723 is a wasteful number, since it uses less digits than its factorization.

1812723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514.

The product of its digits is 672, while the sum is 24.

The square root of 1812723 is about 1346.3740193572. The cubic root of 1812723 is about 121.9299741471.

The spelling of 1812723 in words is "one million, eight hundred twelve thousand, seven hundred twenty-three".