1340856599 has 4 divisors (see below), whose sum is σ = 1399154736. Its totient is φ = 1282558464.

The previous prime is 1340856571. The next prime is 1340856641. The reversal of 1340856599 is 9956580431.

It is a happy number.

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 1340856599 - 2²⁰ = 1339808023 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 (1340856509) 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, 29149034 + ... + 29149079.

It is an arithmetic number, because the mean of its divisors is an integer number (349788684).

Almost surely, 2^1340856599 is an apocalyptic number.

1340856599 is a deficient number, since it is larger than the sum of its proper divisors (58298137).

1340856599 is an equidigital number, since it uses as much as digits as its factorization.

1340856599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58298136.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 1340856599 is about 36617.7088169099. The cubic root of 1340856599 is about 1102.7086412929.

It can be divided in two parts, 13408 and 56599, that added together give a palindrome (70007).

The spelling of 1340856599 in words is "one billion, three hundred forty million, eight hundred fifty-six thousand, five hundred ninety-nine".