1342765681 has 4 divisors (see below), whose sum is σ = 1343500864. Its totient is φ = 1342030500.

The previous prime is 1342765673. The next prime is 1342765729. The reversal of 1342765681 is 1865672431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1342765681 - 2³ = 1342765673 is a prime.

It is a super-2 number, since 2×1342765681² = 3606039348142787522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1342760681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364845 + ... + 368506.

It is an arithmetic number, because the mean of its divisors is an integer number (335875216).

Almost surely, 2^1342765681 is an apocalyptic number.

It is an amenable number.

1342765681 is a deficient number, since it is larger than the sum of its proper divisors (735183).

1342765681 is an equidigital number, since it uses as much as digits as its factorization.

1342765681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735182.

The product of its digits is 241920, while the sum is 43.

The square root of 1342765681 is about 36643.7672872209. The cubic root of 1342765681 is about 1103.2317305169.

The spelling of 1342765681 in words is "one billion, three hundred forty-two million, seven hundred sixty-five thousand, six hundred eighty-one".