1081256 has 24 divisors (see below), whose sum is σ = 2230410. Its totient is φ = 491040.

The previous prime is 1081247. The next prime is 1081277. The reversal of 1081256 is 6521801.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 12100 = 1034^2 + 110^2 .

It is a super-2 number, since 2×1081256² = 2338229075072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410 + ... + 1526.

2^1081256 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 1081256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1115205).

1081256 is an abundant number, since it is smaller than the sum of its proper divisors (1149154).

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

1081256 is a wasteful number, since it uses less digits than its factorization.

1081256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1081256 is about 1039.8346022325. The cubic root of 1081256 is about 102.6383141663.

The spelling of 1081256 in words is "one million, eighty-one thousand, two hundred fifty-six".