1155056 has 20 divisors (see below), whose sum is σ = 2557872. Its totient is φ = 494976.

The previous prime is 1155053. The next prime is 1155061. The reversal of 1155056 is 6505511.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045 + ... + 5268.

2^1155056 is an apocalyptic number.

1155056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1155056 is an abundant number, since it is smaller than the sum of its proper divisors (1402816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155056 is a wasteful number, since it uses less digits than its factorization.

1155056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10328 (or 10322 counting only the distinct ones).

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

The square root of 1155056 is about 1074.7353162523. The cubic root of 1155056 is about 104.9222705149.

It can be divided in two parts, 115505 and 6, that added together give a palindrome (115511).

The spelling of 1155056 in words is "one million, one hundred fifty-five thousand, fifty-six".