1200143142 has 80 divisors (see below), whose sum is σ = 2957340672. Its totient is φ = 360748080.

The previous prime is 1200143129. The next prime is 1200143149. The reversal of 1200143142 is 2413410021.

It is a super-2 number, since 2×1200143142² = 2880687122579264328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200143149) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 223663 + ... + 228965.

Almost surely, 2^1200143142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200143142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478670336).

1200143142 is an abundant number, since it is smaller than the sum of its proper divisors (1757197530).

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

1200143142 is a wasteful number, since it uses less digits than its factorization.

1200143142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455 (or 5446 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1200143142 is about 34643.0821665740. The cubic root of 1200143142 is about 1062.7008205785.

Adding to 1200143142 its reverse (2413410021), we get a palindrome (3613553163).

The spelling of 1200143142 in words is "one billion, two hundred million, one hundred forty-three thousand, one hundred forty-two".