1381155 has 8 divisors (see below), whose sum is σ = 2209872. Its totient is φ = 736608.

The previous prime is 1381153. The next prime is 1381187. The reversal of 1381155 is 5511831.

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

It is not a de Polignac number, because 1381155 - 2¹ = 1381153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381153) 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, 46024 + ... + 46053.

It is an arithmetic number, because the mean of its divisors is an integer number (276234).

2^1381155 is an apocalyptic number.

1381155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1381155 is a deficient number, since it is larger than the sum of its proper divisors (828717).

1381155 is an equidigital number, since it uses as much as digits as its factorization.

1381155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92085.

The product of its digits is 600, while the sum is 24.

The square root of 1381155 is about 1175.2255102745. The cubic root of 1381155 is about 111.3646799594.

Adding to 1381155 its reverse (5511831), we get a palindrome (6892986).

The spelling of 1381155 in words is "one million, three hundred eighty-one thousand, one hundred fifty-five".