1342439681 has 4 divisors (see below), whose sum is σ = 1464479664. Its totient is φ = 1220399700.

The previous prime is 1342439641. The next prime is 1342439713. The reversal of 1342439681 is 1869342431.

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 1342439681 - 2²⁶ = 1275330817 is a prime.

It is a super-2 number, since 2×1342439681² = 3604288594246763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1342439641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61019975 + ... + 61019996.

It is an arithmetic number, because the mean of its divisors is an integer number (366119916).

Almost surely, 2^1342439681 is an apocalyptic number.

1342439681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1342439681 is a deficient number, since it is larger than the sum of its proper divisors (122039983).

1342439681 is a wasteful number, since it uses less digits than its factorization.

1342439681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122039982.

The product of its digits is 124416, while the sum is 41.

The square root of 1342439681 is about 36639.3187846062. The cubic root of 1342439681 is about 1103.1424415072.

The spelling of 1342439681 in words is "one billion, three hundred forty-two million, four hundred thirty-nine thousand, six hundred eighty-one".