1143402142 has 4 divisors (see below), whose sum is σ = 1715103216. Its totient is φ = 571701070.

The previous prime is 1143402089. The next prime is 1143402149. The reversal of 1143402142 is 2412043411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143402149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285850534 + ... + 285850537.

It is an arithmetic number, because the mean of its divisors is an integer number (428775804).

Almost surely, 2^1143402142 is an apocalyptic number.

1143402142 is a deficient number, since it is larger than the sum of its proper divisors (571701074).

1143402142 is an equidigital number, since it uses as much as digits as its factorization.

1143402142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571701073.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1143402142 is about 33814.2298744183. The cubic root of 1143402142 is about 1045.6820839449.

Adding to 1143402142 its reverse (2412043411), we get a palindrome (3555445553).

The spelling of 1143402142 in words is "one billion, one hundred forty-three million, four hundred two thousand, one hundred forty-two".