1809012 has 24 divisors (see below), whose sum is σ = 4245696. Its totient is φ = 599488.

The previous prime is 1808993. The next prime is 1809029. The reversal of 1809012 is 2109081.

It is a super-2 number, since 2×1809012² = 6545048832288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1809012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2473 + ... + 3119.

It is an arithmetic number, because the mean of its divisors is an integer number (176904).

2^1809012 is an apocalyptic number.

1809012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1809012 is an abundant number, since it is smaller than the sum of its proper divisors (2436684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1809012 is a wasteful number, since it uses less digits than its factorization.

1809012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1809012 is about 1344.9951672776. The cubic root of 1809012 is about 121.8467124355.

The spelling of 1809012 in words is "one million, eight hundred nine thousand, twelve".