1226505 has 16 divisors (see below), whose sum is σ = 2242944. Its totient is φ = 560640.

The previous prime is 1226503. The next prime is 1226531. The reversal of 1226505 is 5056221.

It is not a de Polignac number, because 1226505 - 2¹ = 1226503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1226505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1226501) 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, 5736 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (140184).

2^1226505 is an apocalyptic number.

1226505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1226505 is a deficient number, since it is larger than the sum of its proper divisors (1016439).

1226505 is a wasteful number, since it uses less digits than its factorization.

1226505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11696.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1226505 is about 1107.4768620608. The cubic root of 1226505 is about 107.0425486589.

The spelling of 1226505 in words is "one million, two hundred twenty-six thousand, five hundred five".