1143381 has 8 divisors (see below), whose sum is σ = 1537024. Its totient is φ = 756000.

The previous prime is 1143371. The next prime is 1143391. The reversal of 1143381 is 1833411.

It is an interprime number because it is at equal distance from previous prime (1143371) and next prime (1143391).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143381 - 2¹⁰ = 1142357 is a prime.

It is a super-2 number, since 2×1143381² = 2614640222322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (192128).

2^1143381 is an apocalyptic number.

It is an amenable number.

1143381 is a deficient number, since it is larger than the sum of its proper divisors (393643).

1143381 is a wasteful number, since it uses less digits than its factorization.

1143381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 288, while the sum is 21.

The square root of 1143381 is about 1069.2899513228. The cubic root of 1143381 is about 104.5675638867.

Adding to 1143381 its reverse (1833411), we get a palindrome (2976792).

The spelling of 1143381 in words is "one million, one hundred forty-three thousand, three hundred eighty-one".