1240005343 has 4 divisors (see below), whose sum is σ = 1240094080. Its totient is φ = 1239916608.

The previous prime is 1240005337. The next prime is 1240005359. The reversal of 1240005343 is 3435000421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1240005343 - 2¹³ = 1239997151 is a prime.

It is a super-2 number, since 2×1240005343² = 3075226501337095298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240005323) 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, 18303 + ... + 53056.

It is an arithmetic number, because the mean of its divisors is an integer number (310023520).

Almost surely, 2^1240005343 is an apocalyptic number.

1240005343 is a deficient number, since it is larger than the sum of its proper divisors (88737).

1240005343 is an equidigital number, since it uses as much as digits as its factorization.

1240005343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88736.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1240005343 is about 35213.7095887383. The cubic root of 1240005343 is about 1074.3386140467.

Adding to 1240005343 its reverse (3435000421), we get a palindrome (4675005764).

The spelling of 1240005343 in words is "one billion, two hundred forty million, five thousand, three hundred forty-three".