1244012143 has 4 divisors (see below), whose sum is σ = 1357104168. Its totient is φ = 1130920120.

The previous prime is 1244012071. The next prime is 1244012153. The reversal of 1244012143 is 3412104421.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1244012143 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244012153) 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, 56545996 + ... + 56546017.

It is an arithmetic number, because the mean of its divisors is an integer number (339276042).

Almost surely, 2^1244012143 is an apocalyptic number.

1244012143 is a deficient number, since it is larger than the sum of its proper divisors (113092025).

1244012143 is a wasteful number, since it uses less digits than its factorization.

1244012143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113092024.

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

The square root of 1244012143 is about 35270.5563182664. The cubic root of 1244012143 is about 1075.4945315791.

Adding to 1244012143 its reverse (3412104421), we get a palindrome (4656116564).

The spelling of 1244012143 in words is "one billion, two hundred forty-four million, twelve thousand, one hundred forty-three".