1271256 has 96 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 340032.

The previous prime is 1271251. The next prime is 1271293. The reversal of 1271256 is 6521721.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271251) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 27025 + ... + 27071.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2^1271256 is an apocalyptic number.

It is a pronic number, being equal to 1127×1128.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969920).

1271256 is an abundant number, since it is smaller than the sum of its proper divisors (2668584).

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

1271256 is a wasteful number, since it uses less digits than its factorization.

1271256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 82 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1271256 is about 1127.4998891352. The cubic root of 1271256 is about 108.3289013308.

Adding to 1271256 its reverse (6521721), we get a palindrome (7792977).

The spelling of 1271256 in words is "one million, two hundred seventy-one thousand, two hundred fifty-six".