1340679 has 4 divisors (see below), whose sum is σ = 1787576. Its totient is φ = 893784.

The previous prime is 1340653. The next prime is 1340681. The reversal of 1340679 is 9760431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1340679 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340639) 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, 223444 + ... + 223449.

It is an arithmetic number, because the mean of its divisors is an integer number (446894).

2^1340679 is an apocalyptic number.

1340679 is a deficient number, since it is larger than the sum of its proper divisors (446897).

1340679 is an equidigital number, since it uses as much as digits as its factorization.

1340679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446896.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1340679 is about 1157.8769364660. The cubic root of 1340679 is about 110.2659953859.

The spelling of 1340679 in words is "one million, three hundred forty thousand, six hundred seventy-nine".