1380917 has 4 divisors (see below), whose sum is σ = 1384140. Its totient is φ = 1377696.

The previous prime is 1380913. The next prime is 1380931. The reversal of 1380917 is 7190831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7190831 = 433 ⋅16607.

It can be written as a sum of positive squares in 2 ways, for example, as 1274641 + 106276 = 1129^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380917 - 2² = 1380913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1380917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380913) 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, 848 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (346035).

2^1380917 is an apocalyptic number.

It is an amenable number.

1380917 is a deficient number, since it is larger than the sum of its proper divisors (3223).

1380917 is an equidigital number, since it uses as much as digits as its factorization.

1380917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1380917 is about 1175.1242487499. The cubic root of 1380917 is about 111.3582828217.

The spelling of 1380917 in words is "one million, three hundred eighty thousand, nine hundred seventeen".