1226778 has 16 divisors (see below), whose sum is σ = 2804160. Its totient is φ = 350496.

The previous prime is 1226767. The next prime is 1226779. The reversal of 1226778 is 8776221.

It is a super-2 number, since 2×1226778² = 3009968522568, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1226779) 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, 14563 + ... + 14646.

It is an arithmetic number, because the mean of its divisors is an integer number (175260).

2^1226778 is an apocalyptic number.

1226778 is an abundant number, since it is smaller than the sum of its proper divisors (1577382).

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

1226778 is a wasteful number, since it uses less digits than its factorization.

1226778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29221.

The product of its digits is 9408, while the sum is 33.

The square root of 1226778 is about 1107.6001083424. The cubic root of 1226778 is about 107.0504900447.

The spelling of 1226778 in words is "one million, two hundred twenty-six thousand, seven hundred seventy-eight".