1240343111 has 8 divisors (see below), whose sum is σ = 1452109344. Its totient is φ = 1037220480.

The previous prime is 1240343101. The next prime is 1240343131. The reversal of 1240343111 is 1113430421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240343111 - 2²⁶ = 1173234247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240343101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160590 + ... + 2161163.

It is an arithmetic number, because the mean of its divisors is an integer number (181513668).

Almost surely, 2^1240343111 is an apocalyptic number.

1240343111 is a deficient number, since it is larger than the sum of its proper divisors (211766233).

1240343111 is an equidigital number, since it uses as much as digits as its factorization.

1240343111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321801.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1240343111 is about 35218.5052351743. The cubic root of 1240343111 is about 1074.4361524064.

Adding to 1240343111 its reverse (1113430421), we get a palindrome (2353773532).

The spelling of 1240343111 in words is "one billion, two hundred forty million, three hundred forty-three thousand, one hundred eleven".