1226556 has 48 divisors (see below), whose sum is σ = 3269280. Its totient is φ = 397440.

The previous prime is 1226549. The next prime is 1226557. The reversal of 1226556 is 6556221.

1226556 is a `hidden beast` number, since 1 + 2 + 2 + 655 + 6 = 666.

It is a super-2 number, since 2×1226556² = 3008879242272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4290 + ... + 4566.

It is an arithmetic number, because the mean of its divisors is an integer number (68110).

2^1226556 is an apocalyptic number.

It is a pronic number, being equal to 1107×1108.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634640).

1226556 is an abundant number, since it is smaller than the sum of its proper divisors (2042724).

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

1226556 is a wasteful number, since it uses less digits than its factorization.

1226556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 323 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1226556 is about 1107.4998871332. The cubic root of 1226556 is about 107.0440323040.

It can be divided in two parts, 12265 and 56, that added together give a palindrome (12321).

The spelling of 1226556 in words is "one million, two hundred twenty-six thousand, five hundred fifty-six".