1220324242 has 4 divisors (see below), whose sum is σ = 1830486366. Its totient is φ = 610162120.

The previous prime is 1220324239. The next prime is 1220324249. The reversal of 1220324242 is 2424230221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1073938441 + 146385801 = 32771^2 + 12099^2 .

It is a super-2 number, since 2×1220324242² = 2978382511225749128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1220324249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305081059 + ... + 305081062.

Almost surely, 2^1220324242 is an apocalyptic number.

1220324242 is a deficient number, since it is larger than the sum of its proper divisors (610162124).

1220324242 is an equidigital number, since it uses as much as digits as its factorization.

1220324242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610162123.

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

The square root of 1220324242 is about 34933.1395955188. The cubic root of 1220324242 is about 1068.6243835718.

Adding to 1220324242 its reverse (2424230221), we get a palindrome (3644554463).

The spelling of 1220324242 in words is "one billion, two hundred twenty million, three hundred twenty-four thousand, two hundred forty-two".