1243111626 has 12 divisors (see below), whose sum is σ = 2693408562. Its totient is φ = 414370536.

The previous prime is 1243111609. The next prime is 1243111627. The reversal of 1243111626 is 6261113421.

It is a happy number.

1243111626 is a `hidden beast` number, since 1 + 2 + 4 + 31 + 1 + 1 + 626 = 666.

It can be written as a sum of positive squares in only one way, i.e., 686387601 + 556724025 = 26199^2 + 23595^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243111626.

It is not an unprimeable number, because it can be changed into a prime (1243111627) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 34530861 + ... + 34530896.

Almost surely, 2^1243111626 is an apocalyptic number.

1243111626 is an abundant number, since it is smaller than the sum of its proper divisors (1450296936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243111626 is a wasteful number, since it uses less digits than its factorization.

1243111626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69061765 (or 69061762 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1243111626 is about 35257.7881609156. The cubic root of 1243111626 is about 1075.2349588459.

The spelling of 1243111626 in words is "one billion, two hundred forty-three million, one hundred eleven thousand, six hundred twenty-six".