1142239 has 6 divisors (see below), whose sum is σ = 1328784. Its totient is φ = 979020.

The previous prime is 1142237. The next prime is 1142243. The reversal of 1142239 is 9322411.

It is not a de Polignac number, because 1142239 - 2¹ = 1142237 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11607 + ... + 11704.

It is an arithmetic number, because the mean of its divisors is an integer number (221464).

2^1142239 is an apocalyptic number.

1142239 is a deficient number, since it is larger than the sum of its proper divisors (186545).

1142239 is an equidigital number, since it uses as much as digits as its factorization.

1142239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23325 (or 23318 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1142239 is about 1068.7558186976. The cubic root of 1142239 is about 104.5327385347.

The spelling of 1142239 in words is "one million, one hundred forty-two thousand, two hundred thirty-nine".