1340412543 has 24 divisors (see below), whose sum is σ = 2010456448. Its totient is φ = 892453464.

The previous prime is 1340412523. The next prime is 1340412569. The reversal of 1340412543 is 3452140431.

It is a happy number.

1340412543 is a `hidden beast` number, since 1 + 3 + 404 + 1 + 254 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1340412543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340412523) 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 23 ways as a sum of consecutive naturals, for example, 211446 + ... + 217692.

Almost surely, 2^1340412543 is an apocalyptic number.

1340412543 is a deficient number, since it is larger than the sum of its proper divisors (670043905).

1340412543 is an frugal number, since it uses more digits than its factorization.

1340412543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7145 (or 7133 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1340412543 is about 36611.6449097825. The cubic root of 1340412543 is about 1102.5868986066.

Adding to 1340412543 its reverse (3452140431), we get a palindrome (4792552974).

The spelling of 1340412543 in words is "one billion, three hundred forty million, four hundred twelve thousand, five hundred forty-three".