1340042313 has 8 divisors (see below), whose sum is σ = 1787293728. Its totient is φ = 893076224.

The previous prime is 1340042309. The next prime is 1340042339. The reversal of 1340042313 is 3132400431.

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 1340042313 - 2² = 1340042309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340042313.

It is not an unprimeable number, because it can be changed into a prime (1340042303) 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 7 ways as a sum of consecutive naturals, for example, 60120 + ... + 79337.

It is an arithmetic number, because the mean of its divisors is an integer number (223411716).

Almost surely, 2^1340042313 is an apocalyptic number.

It is an amenable number.

1340042313 is a deficient number, since it is larger than the sum of its proper divisors (447251415).

1340042313 is a wasteful number, since it uses less digits than its factorization.

1340042313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142663.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1340042313 is about 36606.5883824210. The cubic root of 1340042313 is about 1102.4853755497.

Adding to 1340042313 its reverse (3132400431), we get a palindrome (4472442744).

The spelling of 1340042313 in words is "one billion, three hundred forty million, forty-two thousand, three hundred thirteen".