1231056 has 60 divisors (see below), whose sum is σ = 3520608. Its totient is φ = 401472.

The previous prime is 1231051. The next prime is 1231063. The reversal of 1231056 is 6501321.

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 (1231051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11901 + ... + 12003.

2^1231056 is an apocalyptic number.

1231056 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 1231056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760304).

1231056 is an abundant number, since it is smaller than the sum of its proper divisors (2289552).

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

1231056 is a wasteful number, since it uses less digits than its factorization.

1231056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1231056 is about 1109.5296300685. The cubic root of 1231056 is about 107.1747805826.

Adding to 1231056 its reverse (6501321), we get a palindrome (7732377).

The spelling of 1231056 in words is "one million, two hundred thirty-one thousand, fifty-six".