1231345342 has 8 divisors (see below), whose sum is σ = 1927323216. Its totient is φ = 588904272.

The previous prime is 1231345337. The next prime is 1231345351. The reversal of 1231345342 is 2435431321.

It is a happy number.

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

It is a super-2 number, since 2×1231345342² = 3032422702530193928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231345342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13384143 + ... + 13384234.

It is an arithmetic number, because the mean of its divisors is an integer number (240915402).

Almost surely, 2^1231345342 is an apocalyptic number.

1231345342 is a deficient number, since it is larger than the sum of its proper divisors (695977874).

1231345342 is a wasteful number, since it uses less digits than its factorization.

1231345342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26768402.

The product of its digits is 8640, while the sum is 28.

The square root of 1231345342 is about 35090.5306599943. The cubic root of 1231345342 is about 1071.8317655493.

Adding to 1231345342 its reverse (2435431321), we get a palindrome (3666776663).

The spelling of 1231345342 in words is "one billion, two hundred thirty-one million, three hundred forty-five thousand, three hundred forty-two".