1121256 has 64 divisors (see below), whose sum is σ = 3240000. Its totient is φ = 358848.

The previous prime is 1121249. The next prime is 1121257. The reversal of 1121256 is 6521211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6175 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (50625).

2^1121256 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 1121256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620000).

1121256 is an abundant number, since it is smaller than the sum of its proper divisors (2118744).

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

1121256 is a wasteful number, since it uses less digits than its factorization.

1121256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 213 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1121256 is about 1058.8937623766. The cubic root of 1121256 is about 103.8886876097. Note that the first 3 decimals are identical.

Adding to 1121256 its reverse (6521211), we get a palindrome (7642467).

The spelling of 1121256 in words is "one million, one hundred twenty-one thousand, two hundred fifty-six".