1340917 has 4 divisors (see below), whose sum is σ = 1377196. Its totient is φ = 1304640.

The previous prime is 1340903. The next prime is 1340929. The reversal of 1340917 is 7190431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7190431 = 541 ⋅13291.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 835396 = 711^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340917 - 2⁷ = 1340789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340891 and 1340900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340947) 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, 18084 + ... + 18157.

It is an arithmetic number, because the mean of its divisors is an integer number (344299).

2^1340917 is an apocalyptic number.

It is an amenable number.

1340917 is a deficient number, since it is larger than the sum of its proper divisors (36279).

1340917 is an equidigital number, since it uses as much as digits as its factorization.

1340917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36278.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1340917 is about 1157.9797062125. The cubic root of 1340917 is about 110.2725198794.

The spelling of 1340917 in words is "one million, three hundred forty thousand, nine hundred seventeen".