1226205 has 32 divisors (see below), whose sum is σ = 2257920. Its totient is φ = 630720.

The previous prime is 1226191. The next prime is 1226209. The reversal of 1226205 is 5026221.

It is not a de Polignac number, because 1226205 - 2⁴ = 1226189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4039 + ... + 4331.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1226205 is an apocalyptic number.

1226205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1226205 is a deficient number, since it is larger than the sum of its proper divisors (1031715).

1226205 is a wasteful number, since it uses less digits than its factorization.

1226205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1226205 is about 1107.3414107672. The cubic root of 1226205 is about 107.0338205023.

It can be divided in two parts, 1226 and 205, that added together give a triangular number (1431 = T₅₃).

The spelling of 1226205 in words is "one million, two hundred twenty-six thousand, two hundred five".