1220242342 has 16 divisors (see below), whose sum is σ = 1997658432. Its totient is φ = 554406120.

The previous prime is 1220242321. The next prime is 1220242343. The reversal of 1220242342 is 2432420221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220242343) 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 7 ways as a sum of consecutive naturals, for example, 43033 + ... + 65515.

It is an arithmetic number, because the mean of its divisors is an integer number (124853652).

Almost surely, 2^1220242342 is an apocalyptic number.

1220242342 is a deficient number, since it is larger than the sum of its proper divisors (777416090).

1220242342 is a wasteful number, since it uses less digits than its factorization.

1220242342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24963.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1220242342 is about 34931.9673365243. The cubic root of 1220242342 is about 1068.6004767302.

Adding to 1220242342 its reverse (2432420221), we get a palindrome (3652662563).

The spelling of 1220242342 in words is "one billion, two hundred twenty million, two hundred forty-two thousand, three hundred forty-two".