1222490445 has 32 divisors (see below), whose sum is σ = 2179215360. Its totient is φ = 580107840.

The previous prime is 1222490441. The next prime is 1222490501. The reversal of 1222490445 is 5440942221.

It is a happy number.

It is not a de Polignac number, because 1222490445 - 2² = 1222490441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222490441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71065 + ... + 86574.

It is an arithmetic number, because the mean of its divisors is an integer number (68100480).

Almost surely, 2^1222490445 is an apocalyptic number.

1222490445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222490445 is a deficient number, since it is larger than the sum of its proper divisors (956724915).

1222490445 is a wasteful number, since it uses less digits than its factorization.

1222490445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157705.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1222490445 is about 34964.1308343279. The cubic root of 1222490445 is about 1069.2563164387.

The spelling of 1222490445 in words is "one billion, two hundred twenty-two million, four hundred ninety thousand, four hundred forty-five".