1405540343 has 4 divisors (see below), whose sum is σ = 1422474648. Its totient is φ = 1388606040.

The previous prime is 1405540319. The next prime is 1405540417. The reversal of 1405540343 is 3430455041.

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 1405540343 - 2¹⁰ = 1405539319 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 (1405540313) 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, 8467028 + ... + 8467193.

It is an arithmetic number, because the mean of its divisors is an integer number (355618662).

Almost surely, 2^1405540343 is an apocalyptic number.

1405540343 is a deficient number, since it is larger than the sum of its proper divisors (16934305).

1405540343 is an equidigital number, since it uses as much as digits as its factorization.

1405540343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16934304.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1405540343 is about 37490.5367126159. The cubic root of 1405540343 is about 1120.1626950621.

Adding to 1405540343 its reverse (3430455041), we get a palindrome (4835995384).

The spelling of 1405540343 in words is "one billion, four hundred five million, five hundred forty thousand, three hundred forty-three".