1818156 has 24 divisors (see below), whose sum is σ = 4286464. Its totient is φ = 599760.

The previous prime is 1818151. The next prime is 1818161. The reversal of 1818156 is 6518181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1818151) and next prime (1818161).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 501 + ... + 1971.

2^1818156 is an apocalyptic number.

It is an amenable number.

1818156 is an abundant number, since it is smaller than the sum of its proper divisors (2468308).

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

1818156 is a wasteful number, since it uses less digits than its factorization.

1818156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581 (or 1579 counting only the distinct ones).

The product of its digits is 1920, while the sum is 30.

The square root of 1818156 is about 1348.3901512545. The cubic root of 1818156 is about 122.0516667303.

The spelling of 1818156 in words is "one million, eight hundred eighteen thousand, one hundred fifty-six".