1143026381 has 12 divisors (see below), whose sum is σ = 1330301340. Its totient is φ = 979251840.

The previous prime is 1143026371. The next prime is 1143026419. The reversal of 1143026381 is 1836203411.

It can be written as a sum of positive squares in 2 ways, for example, as 652802500 + 490223881 = 25550^2 + 22141^2 .

It is not a de Polignac number, because 1143026381 - 2¹⁰ = 1143025357 is a prime.

It is a super-2 number, since 2×1143026381² = 2613018615323914322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143026351) 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, 123371 + ... + 132311.

It is an arithmetic number, because the mean of its divisors is an integer number (110858445).

Almost surely, 2^1143026381 is an apocalyptic number.

It is an amenable number.

1143026381 is a deficient number, since it is larger than the sum of its proper divisors (187274959).

1143026381 is an equidigital number, since it uses as much as digits as its factorization.

1143026381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11564 (or 11557 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1143026381 is about 33808.6731623706. The cubic root of 1143026381 is about 1045.5675224441.

Adding to 1143026381 its reverse (1836203411), we get a palindrome (2979229792).

The spelling of 1143026381 in words is "one billion, one hundred forty-three million, twenty-six thousand, three hundred eighty-one".