1142340233 has 4 divisors (see below), whose sum is σ = 1142750868. Its totient is φ = 1141929600.

The previous prime is 1142340223. The next prime is 1142340253. The reversal of 1142340233 is 3320432411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3320432411 = 5573 ⋅595807.

It can be written as a sum of positive squares in 2 ways, for example, as 294191104 + 848149129 = 17152^2 + 29123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142340233 - 2⁸ = 1142339977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1142340199 and 1142340208.

It is not an unprimeable number, because it can be changed into a prime (1142340223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201116 + ... + 206717.

It is an arithmetic number, because the mean of its divisors is an integer number (285687717).

Almost surely, 2^1142340233 is an apocalyptic number.

It is an amenable number.

1142340233 is a deficient number, since it is larger than the sum of its proper divisors (410635).

1142340233 is an equidigital number, since it uses as much as digits as its factorization.

1142340233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410634.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1142340233 is about 33798.5241245827. The cubic root of 1142340233 is about 1045.3582657793.

Adding to 1142340233 its reverse (3320432411), we get a palindrome (4462772644).

The spelling of 1142340233 in words is "one billion, one hundred forty-two million, three hundred forty thousand, two hundred thirty-three".