1121345 has 8 divisors (see below), whose sum is σ = 1356264. Its totient is φ = 889984.

The previous prime is 1121333. The next prime is 1121347. The reversal of 1121345 is 5431211.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 1117249 = 64^2 + 1057^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1121345 - 2¹⁰ = 1120321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134 + ... + 1503.

It is an arithmetic number, because the mean of its divisors is an integer number (169533).

2^1121345 is an apocalyptic number.

It is an amenable number.

1121345 is a deficient number, since it is larger than the sum of its proper divisors (234919).

1121345 is a wasteful number, since it uses less digits than its factorization.

1121345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779.

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

The square root of 1121345 is about 1058.9357865329. The cubic root of 1121345 is about 103.8914362679.

Adding to 1121345 its reverse (5431211), we get a palindrome (6552556).

The spelling of 1121345 in words is "one million, one hundred twenty-one thousand, three hundred forty-five".