1243242634 has 8 divisors (see below), whose sum is σ = 1865077668. Its totient is φ = 621550080.

The previous prime is 1243242629. The next prime is 1243242643. The reversal of 1243242634 is 4362423421.

It can be written as a sum of positive squares in 2 ways, for example, as 1146161025 + 97081609 = 33855^2 + 9853^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1243242596 and 1243242605.

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, 10167 + ... + 50890.

Almost surely, 2^1243242634 is an apocalyptic number.

1243242634 is a deficient number, since it is larger than the sum of its proper divisors (621835034).

1243242634 is a wasteful number, since it uses less digits than its factorization.

1243242634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71240.

The product of its digits is 27648, while the sum is 31.

The square root of 1243242634 is about 35259.6459709964. The cubic root of 1243242634 is about 1075.2727295042.

The spelling of 1243242634 in words is "one billion, two hundred forty-three million, two hundred forty-two thousand, six hundred thirty-four".