1143120 has 80 divisors (see below), whose sum is σ = 3874752. Its totient is φ = 276480.

The previous prime is 1143113. The next prime is 1143143. The reversal of 1143120 is 213411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1143096 and 1143105.

It is a congruent number.

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, 2424 + ... + 2856.

2^1143120 is an apocalyptic number.

1143120 is a gapful number since it is divisible by the number (10) 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 1143120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937376).

1143120 is an abundant number, since it is smaller than the sum of its proper divisors (2731632).

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

1143120 is a wasteful number, since it uses less digits than its factorization.

1143120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1143120 is about 1069.1679007527. The cubic root of 1143120 is about 104.5596067225.

Adding to 1143120 its reverse (213411), we get a palindrome (1356531).

The spelling of 1143120 in words is "one million, one hundred forty-three thousand, one hundred twenty".