1105381 has 4 divisors (see below), whose sum is σ = 1123564. Its totient is φ = 1087200.

The previous prime is 1105343. The next prime is 1105387. The reversal of 1105381 is 1835011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1835011 = 173 ⋅10607.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 933156 = 415^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105381 - 2¹³ = 1097189 is a prime.

It is a super-2 number, since 2×1105381² = 2443734310322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105387) 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, 9000 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (280891).

2^1105381 is an apocalyptic number.

It is an amenable number.

1105381 is a deficient number, since it is larger than the sum of its proper divisors (18183).

1105381 is an equidigital number, since it uses as much as digits as its factorization.

1105381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18182.

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

The square root of 1105381 is about 1051.3710096821. The cubic root of 1105381 is about 103.3960620399.

The spelling of 1105381 in words is "one million, one hundred five thousand, three hundred eighty-one".