1243420233 has 16 divisors (see below), whose sum is σ = 1810382592. Its totient is φ = 752850000.

The previous prime is 1243420201. The next prime is 1243420259. The reversal of 1243420233 is 3320243421.

It is not a de Polignac number, because 1243420233 - 2⁵ = 1243420201 is a prime.

It is a super-3 number, since 3×1243420233³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243420033) 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 15 ways as a sum of consecutive naturals, for example, 16758 + ... + 52608.

It is an arithmetic number, because the mean of its divisors is an integer number (113148912).

Almost surely, 2^1243420233 is an apocalyptic number.

It is an amenable number.

1243420233 is a deficient number, since it is larger than the sum of its proper divisors (566962359).

1243420233 is a wasteful number, since it uses less digits than its factorization.

1243420233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36916.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243420233 is about 35262.1643266547. The cubic root of 1243420233 is about 1075.3239284854.

Adding to 1243420233 its reverse (3320243421), we get a palindrome (4563663654).

The spelling of 1243420233 in words is "one billion, two hundred forty-three million, four hundred twenty thousand, two hundred thirty-three".