1142000643 has 32 divisors (see below), whose sum is σ = 1837527040. Its totient is φ = 616286880.

The previous prime is 1142000641. The next prime is 1142000663. The reversal of 1142000643 is 3460002411.

It is not a de Polignac number, because 1142000643 - 2¹ = 1142000641 is a prime.

It is a super-2 number, since 2×1142000643² = 2608330937224826898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is the 33794-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142000641) by changing a digit.

It is a nontrivial repunit in base 33793.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127746 + ... + 136392.

It is an arithmetic number, because the mean of its divisors is an integer number (57422720).

Almost surely, 2^1142000643 is an apocalyptic number.

1142000643 is a deficient number, since it is larger than the sum of its proper divisors (695526397).

1142000643 is a wasteful number, since it uses less digits than its factorization.

1142000643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1142000643 is about 33793.5000110968. The cubic root of 1142000643 is about 1045.2546689740.

The spelling of 1142000643 in words is "one billion, one hundred forty-two million, six hundred forty-three", and thus it is an aban number.