1812730 has 8 divisors (see below), whose sum is σ = 3262932. Its totient is φ = 725088.

The previous prime is 1812721. The next prime is 1812749. The reversal of 1812730 is 372181.

It can be written as a sum of positive squares in 2 ways, for example, as 1697809 + 114921 = 1303^2 + 339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 90627 + ... + 90646.

2^1812730 is an apocalyptic number.

1812730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1812730 is a deficient number, since it is larger than the sum of its proper divisors (1450202).

1812730 is a wasteful number, since it uses less digits than its factorization.

1812730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181280.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1812730 is about 1346.3766189295. The cubic root of 1812730 is about 121.9301310950.

The spelling of 1812730 in words is "one million, eight hundred twelve thousand, seven hundred thirty".