1155072 has 56 divisors (see below), whose sum is σ = 3145536. Its totient is φ = 376832.

The previous prime is 1155071. The next prime is 1155097. The reversal of 1155072 is 2705511.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1155071) 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, 24553 + ... + 24599.

2^1155072 is an apocalyptic number.

1155072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572768).

1155072 is an abundant number, since it is smaller than the sum of its proper divisors (1990464).

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

1155072 is an frugal number, since it uses more digits than its factorization.

1155072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 1155072 is about 1074.7427599198. The cubic root of 1155072 is about 104.9227549787.

The spelling of 1155072 in words is "one million, one hundred fifty-five thousand, seventy-two".