1381817 has 8 divisors (see below), whose sum is σ = 1463424. Its totient is φ = 1302048.

The previous prime is 1381769. The next prime is 1381819. The reversal of 1381817 is 7181831.

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 1381817 - 2¹⁰ = 1380793 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 1381817.

It is not an unprimeable number, because it can be changed into a prime (1381819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (182928).

2^1381817 is an apocalyptic number.

It is an amenable number.

1381817 is a deficient number, since it is larger than the sum of its proper divisors (81607).

1381817 is an equidigital number, since it uses as much as digits as its factorization.

1381817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its digits is 1344, while the sum is 29.

The square root of 1381817 is about 1175.5071246062. The cubic root of 1381817 is about 111.3824698147.

The spelling of 1381817 in words is "one million, three hundred eighty-one thousand, eight hundred seventeen".