1143972 has 36 divisors (see below), whose sum is σ = 2962960. Its totient is φ = 371952.

The previous prime is 1143959. The next prime is 1143977. The reversal of 1143972 is 2793411.

1143972 is nontrivially palindromic in base 5.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1143977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179 + ... + 1917.

2^1143972 is an apocalyptic number.

1143972 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 1143972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481480).

1143972 is an abundant number, since it is smaller than the sum of its proper divisors (1818988).

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

1143972 is a wasteful number, since it uses less digits than its factorization.

1143972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 787 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1143972 is about 1069.5662672317. The cubic root of 1143972 is about 104.5855773589.

It can be divided in two parts, 11439 and 72, that added together give a palindrome (11511).

The spelling of 1143972 in words is "one million, one hundred forty-three thousand, nine hundred seventy-two".