1142420233 has 4 divisors (see below), whose sum is σ = 1142566660. Its totient is φ = 1142273808.

The previous prime is 1142420231. The next prime is 1142420249. The reversal of 1142420233 is 3320242411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3320242411 = 547 ⋅6069913.

It can be written as a sum of positive squares in 2 ways, for example, as 614891209 + 527529024 = 24797^2 + 22968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142420233 - 2¹ = 1142420231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142420231) 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, 60810 + ... + 77347.

It is an arithmetic number, because the mean of its divisors is an integer number (285641665).

Almost surely, 2^1142420233 is an apocalyptic number.

It is an amenable number.

1142420233 is a deficient number, since it is larger than the sum of its proper divisors (146427).

1142420233 is an equidigital number, since it uses as much as digits as its factorization.

1142420233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146426.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1142420233 is about 33799.7075874925. The cubic root of 1142420233 is about 1045.3826679398.

Adding to 1142420233 its reverse (3320242411), we get a palindrome (4462662644).

The spelling of 1142420233 in words is "one billion, one hundred forty-two million, four hundred twenty thousand, two hundred thirty-three".