1121456 has 80 divisors (see below), whose sum is σ = 2856960. Its totient is φ = 414720.

The previous prime is 1121453. The next prime is 1121509. The reversal of 1121456 is 6541211.

It is not an unprimeable number, because it can be changed into a prime (1121453) 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, 36161 + ... + 36191.

It is an arithmetic number, because the mean of its divisors is an integer number (35712).

2^1121456 is an apocalyptic number.

1121456 is a gapful number since it is divisible by the number (16) 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 1121456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428480).

1121456 is an abundant number, since it is smaller than the sum of its proper divisors (1735504).

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

1121456 is a wasteful number, since it uses less digits than its factorization.

1121456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 76 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1121456 is about 1058.9881963459. The cubic root of 1121456 is about 103.8948641659.

Adding to 1121456 its reverse (6541211), we get a palindrome (7662667).

The spelling of 1121456 in words is "one million, one hundred twenty-one thousand, four hundred fifty-six".