1226905 has 8 divisors (see below), whose sum is σ = 1497600. Its totient is φ = 964656.

The previous prime is 1226899. The next prime is 1226959. The reversal of 1226905 is 5096221.

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

It is a cyclic number.

It is not a de Polignac number, because 1226905 - 2¹¹ = 1224857 is a prime.

It is an Ulam number.

1226905 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 2374.

It is an arithmetic number, because the mean of its divisors is an integer number (187200).

2^1226905 is an apocalyptic number.

It is an amenable number.

1226905 is a deficient number, since it is larger than the sum of its proper divisors (270695).

1226905 is an equidigital number, since it uses as much as digits as its factorization.

1226905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1226905 is about 1107.6574380195. The cubic root of 1226905 is about 107.0541839874.

The spelling of 1226905 in words is "one million, two hundred twenty-six thousand, nine hundred five".