142543811 has 12 divisors (see below), whose sum is σ = 149588712. Its totient is φ = 135818496.

The previous prime is 142543781. The next prime is 142543813. The reversal of 142543811 is 118345241.

It is a de Polignac number, because none of the positive numbers 2^k-142543811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142543813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246755 + ... + 247331.

It is an arithmetic number, because the mean of its divisors is an integer number (12465726).

Almost surely, 2^142543811 is an apocalyptic number.

142543811 is a deficient number, since it is larger than the sum of its proper divisors (7044901).

142543811 is an equidigital number, since it uses as much as digits as its factorization.

142543811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1067 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 142543811 is about 11939.1712861488. The cubic root of 142543811 is about 522.3754864586.

The spelling of 142543811 in words is "one hundred forty-two million, five hundred forty-three thousand, eight hundred eleven".