1142631643 has 4 divisors (see below), whose sum is σ = 1149015240. Its totient is φ = 1136248048.

The previous prime is 1142631629. The next prime is 1142631661. The reversal of 1142631643 is 3461362411.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142631643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142631673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191530 + ... + 3191887.

It is an arithmetic number, because the mean of its divisors is an integer number (287253810).

Almost surely, 2^1142631643 is an apocalyptic number.

1142631643 is a deficient number, since it is larger than the sum of its proper divisors (6383597).

1142631643 is an equidigital number, since it uses as much as digits as its factorization.

1142631643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383596.

The product of its digits is 10368, while the sum is 31.

The square root of 1142631643 is about 33802.8348367411. The cubic root of 1142631643 is about 1045.4471482167.

The spelling of 1142631643 in words is "one billion, one hundred forty-two million, six hundred thirty-one thousand, six hundred forty-three".