1243433042 has 4 divisors (see below), whose sum is σ = 1865149566. Its totient is φ = 621716520.

The previous prime is 1243433027. The next prime is 1243433141. The reversal of 1243433042 is 2403343421.

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

It can be written as a sum of positive squares in only one way, i.e., 811167361 + 432265681 = 28481^2 + 20791^2 .

It is a super-2 number, since 2×1243433042² = 3092251459874747528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310858259 + ... + 310858262.

Almost surely, 2^1243433042 is an apocalyptic number.

1243433042 is a deficient number, since it is larger than the sum of its proper divisors (621716524).

1243433042 is an equidigital number, since it uses as much as digits as its factorization.

1243433042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621716523.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 1243433042 is about 35262.3459514537. The cubic root of 1243433042 is about 1075.3276209289.

Adding to 1243433042 its reverse (2403343421), we get a palindrome (3646776463).

The spelling of 1243433042 in words is "one billion, two hundred forty-three million, four hundred thirty-three thousand, forty-two".