1143139 has 4 divisors (see below), whose sum is σ = 1149256. Its totient is φ = 1137024.

The previous prime is 1143113. The next prime is 1143143. The reversal of 1143139 is 9313411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9313411 = 383 ⋅24317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2769 + ... + 3154.

It is an arithmetic number, because the mean of its divisors is an integer number (287314).

2^1143139 is an apocalyptic number.

1143139 is a deficient number, since it is larger than the sum of its proper divisors (6117).

1143139 is an equidigital number, since it uses as much as digits as its factorization.

1143139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116.

The product of its digits is 324, while the sum is 22.

The square root of 1143139 is about 1069.1767861303. The cubic root of 1143139 is about 104.5601860206.

The spelling of 1143139 in words is "one million, one hundred forty-three thousand, one hundred thirty-nine".