1155605 has 8 divisors (see below), whose sum is σ = 1512864. Its totient is φ = 840400.

The previous prime is 1155601. The next prime is 1155607. The reversal of 1155605 is 5065511.

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

It is not a de Polignac number, because 1155605 - 2² = 1155601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10451 + ... + 10560.

It is an arithmetic number, because the mean of its divisors is an integer number (189108).

2^1155605 is an apocalyptic number.

It is an amenable number.

1155605 is a deficient number, since it is larger than the sum of its proper divisors (357259).

1155605 is a wasteful number, since it uses less digits than its factorization.

1155605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21027.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1155605 is about 1074.9906976342. The cubic root of 1155605 is about 104.9388911240.

The spelling of 1155605 in words is "one million, one hundred fifty-five thousand, six hundred five".