1811152 has 40 divisors (see below), whose sum is σ = 4075136. Its totient is φ = 763776.

The previous prime is 1811141. The next prime is 1811167. The reversal of 1811152 is 2511181.

It is a happy number.

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, 11458 + ... + 11614.

2^1811152 is an apocalyptic number.

1811152 is the 1099-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1811152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037568).

1811152 is an abundant number, since it is smaller than the sum of its proper divisors (2263984).

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

1811152 is a wasteful number, since it uses less digits than its factorization.

1811152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its digits is 80, while the sum is 19.

The square root of 1811152 is about 1345.7904740338. The cubic root of 1811152 is about 121.8947403484.

The spelling of 1811152 in words is "one million, eight hundred eleven thousand, one hundred fifty-two".