1123145 has 4 divisors (see below), whose sum is σ = 1347780. Its totient is φ = 898512.

The previous prime is 1123127. The next prime is 1123151. The reversal of 1123145 is 5413211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 284089 = 916^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123145 - 2⁶ = 1123081 is a prime.

It is a super-2 number, since 2×1123145² = 2522909382050, which contains 22 as substring.

It is a plaindrome in base 16.

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, 112310 + ... + 112319.

It is an arithmetic number, because the mean of its divisors is an integer number (336945).

2^1123145 is an apocalyptic number.

It is an amenable number.

1123145 is a deficient number, since it is larger than the sum of its proper divisors (224635).

1123145 is an equidigital number, since it uses as much as digits as its factorization.

1123145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224634.

The product of its digits is 120, while the sum is 17.

The square root of 1123145 is about 1059.7853556263. The cubic root of 1123145 is about 103.9469959198.

Adding to 1123145 its reverse (5413211), we get a palindrome (6536356).

The spelling of 1123145 in words is "one million, one hundred twenty-three thousand, one hundred forty-five".