1155245 has 16 divisors (see below), whose sum is σ = 1706880. Its totient is φ = 730944.

The previous prime is 1155239. The next prime is 1155247. The reversal of 1155245 is 5425511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1155245 - 2¹⁰ = 1154221 is a prime.

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 1155245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (106680).

2^1155245 is an apocalyptic number.

It is an amenable number.

1155245 is a deficient number, since it is larger than the sum of its proper divisors (551635).

1155245 is a wasteful number, since it uses less digits than its factorization.

1155245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its digits is 1000, while the sum is 23.

The square root of 1155245 is about 1074.8232412820. The cubic root of 1155245 is about 104.9279929582.

The spelling of 1155245 in words is "one million, one hundred fifty-five thousand, two hundred forty-five".