1281826 has 16 divisors (see below), whose sum is σ = 2366784. Its totient is φ = 507024.

The previous prime is 1281823. The next prime is 1281827. The reversal of 1281826 is 6281821.

It is a junction number, because it is equal to n+sod(n) for n = 1281794 and 1281803.

It is not an unprimeable number, because it can be changed into a prime (1281821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3340 + ... + 3703.

It is an arithmetic number, because the mean of its divisors is an integer number (147924).

2^1281826 is an apocalyptic number.

1281826 is a deficient number, since it is larger than the sum of its proper divisors (1084958).

1281826 is a wasteful number, since it uses less digits than its factorization.

1281826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7065.

The product of its digits is 1536, while the sum is 28.

The square root of 1281826 is about 1132.1775479138. The cubic root of 1281826 is about 108.6283106169.

The spelling of 1281826 in words is "one million, two hundred eighty-one thousand, eight hundred twenty-six".