1812087 has 12 divisors (see below), whose sum is σ = 2755480. Its totient is φ = 1144368.

The previous prime is 1812073. The next prime is 1812089. The reversal of 1812087 is 7802181.

It is not a de Polignac number, because 1812087 - 2⁷ = 1811959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1812087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5128 + ... + 5469.

2^1812087 is an apocalyptic number.

1812087 is a deficient number, since it is larger than the sum of its proper divisors (943393).

1812087 is a wasteful number, since it uses less digits than its factorization.

1812087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622 (or 10619 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1812087 is about 1346.1378086957. The cubic root of 1812087 is about 121.9157126311.

The spelling of 1812087 in words is "one million, eight hundred twelve thousand, eighty-seven".