1143567642 has 32 divisors (see below), whose sum is σ = 2615444352. Its totient is φ = 326536704.

The previous prime is 1143567641. The next prime is 1143567683. The reversal of 1143567642 is 2467653411.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143567642.

It is not an unprimeable number, because it can be changed into a prime (1143567641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71398 + ... + 85934.

It is an arithmetic number, because the mean of its divisors is an integer number (81732636).

Almost surely, 2^1143567642 is an apocalyptic number.

1143567642 is an abundant number, since it is smaller than the sum of its proper divisors (1471876710).

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

1143567642 is a wasteful number, since it uses less digits than its factorization.

1143567642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16422.

The product of its digits is 120960, while the sum is 39.

The square root of 1143567642 is about 33816.6769804486. The cubic root of 1143567642 is about 1045.7325333973.

The spelling of 1143567642 in words is "one billion, one hundred forty-three million, five hundred sixty-seven thousand, six hundred forty-two".