1220240042 has 48 divisors (see below), whose sum is σ = 2327263488. Its totient is φ = 476300160.

The previous prime is 1220240039. The next prime is 1220240069. The reversal of 1220240042 is 2400420221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1220240042.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39833 + ... + 63459.

It is an arithmetic number, because the mean of its divisors is an integer number (48484656).

Almost surely, 2^1220240042 is an apocalyptic number.

1220240042 is a deficient number, since it is larger than the sum of its proper divisors (1107023446).

1220240042 is a wasteful number, since it uses less digits than its factorization.

1220240042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23691 (or 23684 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1220240042 is about 34931.9344153741. The cubic root of 1220240042 is about 1068.5998053383.

Adding to 1220240042 its reverse (2400420221), we get a palindrome (3620660263).

The spelling of 1220240042 in words is "one billion, two hundred twenty million, two hundred forty thousand, forty-two".