1156644 has 54 divisors (see below), whose sum is σ = 3120390. Its totient is φ = 361152.

The previous prime is 1156643. The next prime is 1156681. The reversal of 1156644 is 4466511.

1156644 is a `hidden beast` number, since 1 + 15 + 6 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 831744 + 324900 = 912^2 + 570^2 .

It is not an unprimeable number, because it can be changed into a prime (1156643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12952 + ... + 13040.

It is an arithmetic number, because the mean of its divisors is an integer number (57785).

2^1156644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560195).

1156644 is an abundant number, since it is smaller than the sum of its proper divisors (1963746).

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

1156644 is a wasteful number, since it uses less digits than its factorization.

1156644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 113 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1156644 is about 1075.4738490545. The cubic root of 1156644 is about 104.9703317539.

The spelling of 1156644 in words is "one million, one hundred fifty-six thousand, six hundred forty-four".