1222540306 has 16 divisors (see below), whose sum is σ = 1989086400. Its totient is φ = 560188368.

The previous prime is 1222540301. The next prime is 1222540379. The reversal of 1222540306 is 6030452221.

It is not an unprimeable number, because it can be changed into a prime (1222540301) 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, 165526 + ... + 172753.

It is an arithmetic number, because the mean of its divisors is an integer number (124317900).

Almost surely, 2^1222540306 is an apocalyptic number.

1222540306 is a deficient number, since it is larger than the sum of its proper divisors (766546094).

1222540306 is a wasteful number, since it uses less digits than its factorization.

1222540306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338433.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1222540306 is about 34964.8438577952. The cubic root of 1222540306 is about 1069.2708532842.

Adding to 1222540306 its reverse (6030452221), we get a palindrome (7252992527).

The spelling of 1222540306 in words is "one billion, two hundred twenty-two million, five hundred forty thousand, three hundred six".