1812442 has 8 divisors (see below), whose sum is σ = 2812500. Its totient is φ = 874944.

The previous prime is 1812439. The next prime is 1812443. The reversal of 1812442 is 2442181.

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 14161 = 1341^2 + 119^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1812443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15567 + ... + 15682.

2^1812442 is an apocalyptic number.

1812442 is a deficient number, since it is larger than the sum of its proper divisors (1000058).

1812442 is a wasteful number, since it uses less digits than its factorization.

1812442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31280.

The product of its digits is 512, while the sum is 22.

The square root of 1812442 is about 1346.2696609521. The cubic root of 1812442 is about 121.9236734799.

The spelling of 1812442 in words is "one million, eight hundred twelve thousand, four hundred forty-two".