1151105 has 4 divisors (see below), whose sum is σ = 1381332. Its totient is φ = 920880.

The previous prime is 1151089. The next prime is 1151113. The reversal of 1151105 is 5011511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011511 = 2089 ⋅2399.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 913936 = 487^2 + 956^2 .

It is not a de Polignac number, because 1151105 - 2⁴ = 1151089 is a prime.

It is an Ulam number.

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 1151105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115106 + ... + 115115.

It is an arithmetic number, because the mean of its divisors is an integer number (345333).

2^1151105 is an apocalyptic number.

It is an amenable number.

1151105 is a deficient number, since it is larger than the sum of its proper divisors (230227).

1151105 is an equidigital number, since it uses as much as digits as its factorization.

1151105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230226.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 1151105 is about 1072.8956146802. The cubic root of 1151105 is about 104.8025010086.

Adding to 1151105 its reverse (5011511), we get a palindrome (6162616).

The spelling of 1151105 in words is "one million, one hundred fifty-one thousand, one hundred five".