1181345 has 16 divisors (see below), whose sum is σ = 1582848. Its totient is φ = 839040.

The previous prime is 1181329. The next prime is 1181407. The reversal of 1181345 is 5431811.

It is not a de Polignac number, because 1181345 - 2⁴ = 1181329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1181345.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2357 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (98928).

2^1181345 is an apocalyptic number.

It is an amenable number.

1181345 is a deficient number, since it is larger than the sum of its proper divisors (401503).

1181345 is a wasteful number, since it uses less digits than its factorization.

1181345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its digits is 480, while the sum is 23.

The square root of 1181345 is about 1086.8969592376. The cubic root of 1181345 is about 105.7123147394.

The spelling of 1181345 in words is "one million, one hundred eighty-one thousand, three hundred forty-five".