1143872 has 28 divisors (see below), whose sum is σ = 2314956. Its totient is φ = 560640.

The previous prime is 1143851. The next prime is 1143887. The reversal of 1143872 is 2783411.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 602176 = 736^2 + 776^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3758 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (82677).

2^1143872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157478).

1143872 is an abundant number, since it is smaller than the sum of its proper divisors (1171084).

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

1143872 is an equidigital number, since it uses as much as digits as its factorization.

1143872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 356 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 1143872 is about 1069.5195182885. The cubic root of 1143872 is about 104.5825298302.

The spelling of 1143872 in words is "one million, one hundred forty-three thousand, eight hundred seventy-two".