1240340343 has 16 divisors (see below), whose sum is σ = 1882573056. Its totient is φ = 719037440.

The previous prime is 1240340341. The next prime is 1240340347. The reversal of 1240340343 is 3430430421.

It is not a de Polignac number, because 1240340343 - 2¹ = 1240340341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240340341) 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 15 ways as a sum of consecutive naturals, for example, 816330 + ... + 817847.

It is an arithmetic number, because the mean of its divisors is an integer number (117660816).

Almost surely, 2^1240340343 is an apocalyptic number.

1240340343 is a deficient number, since it is larger than the sum of its proper divisors (642232713).

1240340343 is a wasteful number, since it uses less digits than its factorization.

1240340343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634214.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1240340343 is about 35218.4659376299. The cubic root of 1240340343 is about 1074.4353531541.

Adding to 1240340343 its reverse (3430430421), we get a palindrome (4670770764).

The spelling of 1240340343 in words is "one billion, two hundred forty million, three hundred forty thousand, three hundred forty-three".