1281026 has 8 divisors (see below), whose sum is σ = 1930620. Its totient is φ = 637488.

The previous prime is 1280989. The next prime is 1281029. The reversal of 1281026 is 6201821.

It can be written as a sum of positive squares in 2 ways, for example, as 1100401 + 180625 = 1049^2 + 425^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1281026² = 3282055225352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1280989 and 1281007.

It is not an unprimeable number, because it can be changed into a prime (1281029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941 + ... + 1856.

2^1281026 is an apocalyptic number.

1281026 is a deficient number, since it is larger than the sum of its proper divisors (649594).

1281026 is a wasteful number, since it uses less digits than its factorization.

1281026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1281026 is about 1131.8241912947. The cubic root of 1281026 is about 108.6057072543.

Adding to 1281026 its reverse (6201821), we get a palindrome (7482847).

It can be divided in two parts, 128 and 1026, that multiplied together give a triangular number (131328 = T₅₁₂).

The spelling of 1281026 in words is "one million, two hundred eighty-one thousand, twenty-six".