1381169 has 4 divisors (see below), whose sum is σ = 1385844. Its totient is φ = 1376496.

The previous prime is 1381153. The next prime is 1381187. The reversal of 1381169 is 9611831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9611831 = 61 ⋅157571.

It can be written as a sum of positive squares in 2 ways, for example, as 833569 + 547600 = 913^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381169 - 2⁴ = 1381153 is a prime.

It is a super-2 number, since 2×1381169² = 3815255613122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1381109) 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, 1862 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (346461).

2^1381169 is an apocalyptic number.

It is an amenable number.

1381169 is a deficient number, since it is larger than the sum of its proper divisors (4675).

1381169 is an equidigital number, since it uses as much as digits as its factorization.

1381169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674.

The product of its digits is 1296, while the sum is 29.

The square root of 1381169 is about 1175.2314665631. The cubic root of 1381169 is about 111.3650562388.

The spelling of 1381169 in words is "one million, three hundred eighty-one thousand, one hundred sixty-nine".