1812002 has 8 divisors (see below), whose sum is σ = 2734236. Its totient is φ = 900592.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812002 is 2002181.

It can be written as a sum of positive squares in 2 ways, for example, as 1485961 + 326041 = 1219^2 + 571^2 .

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

It is an Ulam number.

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, 2273 + ... + 2964.

2^1812002 is an apocalyptic number.

1812002 is a deficient number, since it is larger than the sum of its proper divisors (922234).

1812002 is a wasteful number, since it uses less digits than its factorization.

1812002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1812002 is about 1346.1062365207. The cubic root of 1812002 is about 121.9138063581.

Adding to 1812002 its reverse (2002181), we get a palindrome (3814183).

The spelling of 1812002 in words is "one million, eight hundred twelve thousand, two".