1155745 has 8 divisors (see below), whose sum is σ = 1468584. Its totient is φ = 870144.

The previous prime is 1155733. The next prime is 1155821. The reversal of 1155745 is 5475511.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 1096209 = 244^2 + 1047^2 .

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 1155745 - 2⁷ = 1155617 is a prime.

It is a super-3 number, since 3×1155745³ = 4631347033350355875, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6714 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (183573).

2^1155745 is an apocalyptic number.

It is an amenable number.

1155745 is a deficient number, since it is larger than the sum of its proper divisors (312839).

1155745 is a wasteful number, since it uses less digits than its factorization.

1155745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13619.

The product of its digits is 3500, while the sum is 28.

The square root of 1155745 is about 1075.0558125046. The cubic root of 1155745 is about 104.9431286883.

It can be divided in two parts, 115 and 5745, that multiplied together give a triangular number (660675 = T₁₁₄₉).

The spelling of 1155745 in words is "one million, one hundred fifty-five thousand, seven hundred forty-five".