1143912 has 64 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 296640.

The previous prime is 1143893. The next prime is 1143943. The reversal of 1143912 is 2193411.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2^1143912 is an apocalyptic number.

1143912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785600).

1143912 is an abundant number, since it is smaller than the sum of its proper divisors (2427288).

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

1143912 is a wasteful number, since it uses less digits than its factorization.

1143912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 642 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 1143912 is about 1069.5382181110. The cubic root of 1143912 is about 104.5837488630.

The spelling of 1143912 in words is "one million, one hundred forty-three thousand, nine hundred twelve".