1222668642 has 32 divisors (see below), whose sum is σ = 2634992640. Its totient is φ = 375984000.

The previous prime is 1222668631. The next prime is 1222668647. The reversal of 1222668642 is 2468662221.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1222668642.

It is not an unprimeable number, because it can be changed into a prime (1222668647) 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, 171142 + ... + 178142.

It is an arithmetic number, because the mean of its divisors is an integer number (82343520).

Almost surely, 2^1222668642 is an apocalyptic number.

1222668642 is an abundant number, since it is smaller than the sum of its proper divisors (1412323998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222668642 is a wasteful number, since it uses less digits than its factorization.

1222668642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9258.

The product of its digits is 110592, while the sum is 39.

The square root of 1222668642 is about 34966.6790244656. The cubic root of 1222668642 is about 1069.3082674952.

The spelling of 1222668642 in words is "one billion, two hundred twenty-two million, six hundred sixty-eight thousand, six hundred forty-two".