1220001242 has 4 divisors (see below), whose sum is σ = 1830001866. Its totient is φ = 610000620.

The previous prime is 1220001221. The next prime is 1220001253. The reversal of 1220001242 is 2421000221.

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., 1217242321 + 2758921 = 34889^2 + 1661^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305000309 + ... + 305000312.

Almost surely, 2^1220001242 is an apocalyptic number.

1220001242 is a deficient number, since it is larger than the sum of its proper divisors (610000624).

1220001242 is an equidigital number, since it uses as much as digits as its factorization.

1220001242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610000623.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1220001242 is about 34928.5161723197. The cubic root of 1220001242 is about 1068.5300927482.

Adding to 1220001242 its reverse (2421000221), we get a palindrome (3641001463).

The spelling of 1220001242 in words is "one billion, two hundred twenty million, one thousand, two hundred forty-two".