1201142143 has 4 divisors (see below), whose sum is σ = 1201624528. Its totient is φ = 1200659760.

The previous prime is 1201142101. The next prime is 1201142207. The reversal of 1201142143 is 3412411021.

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-1201142143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201142143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201142743) 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, 237438 + ... + 242443.

It is an arithmetic number, because the mean of its divisors is an integer number (300406132).

Almost surely, 2^1201142143 is an apocalyptic number.

1201142143 is a deficient number, since it is larger than the sum of its proper divisors (482385).

1201142143 is an equidigital number, since it uses as much as digits as its factorization.

1201142143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482384.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1201142143 is about 34657.4976448098. The cubic root of 1201142143 is about 1062.9956034010.

Adding to 1201142143 its reverse (3412411021), we get a palindrome (4613553164).

The spelling of 1201142143 in words is "one billion, two hundred one million, one hundred forty-two thousand, one hundred forty-three".