1213543042 has 8 divisors (see below), whose sum is σ = 1820657916. Its totient is φ = 606657072.

The previous prime is 1213543027. The next prime is 1213543073. The reversal of 1213543042 is 2403453121.

It can be written as a sum of positive squares in 2 ways, for example, as 1210413681 + 3129361 = 34791^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1213543042² = 2945373429573227528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213542998 and 1213543016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43293 + ... + 65584.

Almost surely, 2^1213543042 is an apocalyptic number.

1213543042 is a deficient number, since it is larger than the sum of its proper divisors (607114874).

1213543042 is a wasteful number, since it uses less digits than its factorization.

1213543042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114452.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1213543042 is about 34835.9446836167. The cubic root of 1213543042 is about 1066.6412985937.

Adding to 1213543042 its reverse (2403453121), we get a palindrome (3616996163).

The spelling of 1213543042 in words is "one billion, two hundred thirteen million, five hundred forty-three thousand, forty-two".