1142120233 has 4 divisors (see below), whose sum is σ = 1144619860. Its totient is φ = 1139620608.

The previous prime is 1142120227. The next prime is 1142120237. The reversal of 1142120233 is 3320212411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 457617664 + 684502569 = 21392^2 + 26163^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142120233 - 2⁵ = 1142120201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142120233.

It is not an unprimeable number, because it can be changed into a prime (1142120237) 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, 1249128 + ... + 1250041.

It is an arithmetic number, because the mean of its divisors is an integer number (286154965).

Almost surely, 2^1142120233 is an apocalyptic number.

It is an amenable number.

1142120233 is a deficient number, since it is larger than the sum of its proper divisors (2499627).

1142120233 is an equidigital number, since it uses as much as digits as its factorization.

1142120233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499626.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1142120233 is about 33795.2693878892. The cubic root of 1142120233 is about 1045.2911539630.

Adding to 1142120233 its reverse (3320212411), we get a palindrome (4462332644).

The spelling of 1142120233 in words is "one billion, one hundred forty-two million, one hundred twenty thousand, two hundred thirty-three".