1240241143 has 4 divisors (see below), whose sum is σ = 1243754928. Its totient is φ = 1236727360.

The previous prime is 1240241129. The next prime is 1240241179. The reversal of 1240241143 is 3411420421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1240241143 - 2¹³ = 1240232951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240241243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756363 + ... + 1757068.

It is an arithmetic number, because the mean of its divisors is an integer number (310938732).

Almost surely, 2^1240241143 is an apocalyptic number.

1240241143 is a deficient number, since it is larger than the sum of its proper divisors (3513785).

1240241143 is an equidigital number, since it uses as much as digits as its factorization.

1240241143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513784.

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

The square root of 1240241143 is about 35217.0575573826. The cubic root of 1240241143 is about 1074.4067086428.

Adding to 1240241143 its reverse (3411420421), we get a palindrome (4651661564).

The spelling of 1240241143 in words is "one billion, two hundred forty million, two hundred forty-one thousand, one hundred forty-three".