1381105 has 8 divisors (see below), whose sum is σ = 1808064. Its totient is φ = 1004400.

The previous prime is 1381103. The next prime is 1381109. The reversal of 1381105 is 5011831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381105 - 2¹ = 1381103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12501 + ... + 12610.

It is an arithmetic number, because the mean of its divisors is an integer number (226008).

2^1381105 is an apocalyptic number.

It is an amenable number.

1381105 is a deficient number, since it is larger than the sum of its proper divisors (426959).

1381105 is a wasteful number, since it uses less digits than its factorization.

1381105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25127.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1381105 is about 1175.2042375689. The cubic root of 1381105 is about 111.3633360839.

Adding to 1381105 its reverse (5011831), we get a palindrome (6392936).

It can be divided in two parts, 13 and 81105, that added together give a palindrome (81118).

The spelling of 1381105 in words is "one million, three hundred eighty-one thousand, one hundred five".