1340105431 has 8 divisors (see below), whose sum is σ = 1536444704. Its totient is φ = 1144990080.

The previous prime is 1340105413. The next prime is 1340105441. The reversal of 1340105431 is 1345010431.

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 1340105431 - 2⁷ = 1340105303 is a prime.

It is a super-3 number, since 3×1340105431³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340105411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303630 + ... + 308011.

It is an arithmetic number, because the mean of its divisors is an integer number (192055588).

Almost surely, 2^1340105431 is an apocalyptic number.

1340105431 is a deficient number, since it is larger than the sum of its proper divisors (196339273).

1340105431 is an equidigital number, since it uses as much as digits as its factorization.

1340105431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611961.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1340105431 is about 36607.4504848398. The cubic root of 1340105431 is about 1102.5026848487.

Adding to 1340105431 its reverse (1345010431), we get a palindrome (2685115862).

The spelling of 1340105431 in words is "one billion, three hundred forty million, one hundred five thousand, four hundred thirty-one".