1155445 has 8 divisors (see below), whose sum is σ = 1395360. Its totient is φ = 918480.

The previous prime is 1155437. The next prime is 1155449. The reversal of 1155445 is 5445511.

It is a happy number.

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

It is not a de Polignac number, because 1155445 - 2³ = 1155437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155449) 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, 250 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (174420).

2^1155445 is an apocalyptic number.

It is an amenable number.

1155445 is a deficient number, since it is larger than the sum of its proper divisors (239915).

1155445 is a wasteful number, since it uses less digits than its factorization.

1155445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475.

The product of its digits is 2000, while the sum is 25.

The square root of 1155445 is about 1074.9162758094. The cubic root of 1155445 is about 104.9340477742.

It can be divided in two parts, 1155 and 445, that added together give a square (1600 = 40²).

The spelling of 1155445 in words is "one million, one hundred fifty-five thousand, four hundred forty-five".