1281126 has 64 divisors (see below), whose sum is σ = 3317760. Its totient is φ = 320160.

The previous prime is 1281101. The next prime is 1281131. The reversal of 1281126 is 6211821.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21685 + ... + 21743.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2^1281126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658880).

1281126 is an abundant number, since it is smaller than the sum of its proper divisors (2036634).

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

1281126 is a wasteful number, since it uses less digits than its factorization.

1281126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129.

The product of its digits is 192, while the sum is 21.

The square root of 1281126 is about 1131.8683669049. The cubic root of 1281126 is about 108.6085331892.

Adding to 1281126 its reverse (6211821), we get a palindrome (7492947).

The spelling of 1281126 in words is "one million, two hundred eighty-one thousand, one hundred twenty-six".