1020020242 has 4 divisors (see below), whose sum is σ = 1530030366. Its totient is φ = 510010120.

The previous prime is 1020020231. The next prime is 1020020279. The reversal of 1020020242 is 2420200201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2420200201 = 673 ⋅3596137.

It can be written as a sum of positive squares in only one way, i.e., 918635481 + 101384761 = 30309^2 + 10069^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255005059 + ... + 255005062.

Almost surely, 2^1020020242 is an apocalyptic number.

1020020242 is a deficient number, since it is larger than the sum of its proper divisors (510010124).

1020020242 is an equidigital number, since it uses as much as digits as its factorization.

1020020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510010123.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1020020242 is about 31937.7557445729. The cubic root of 1020020242 is about 1006.6293683582.

Adding to 1020020242 its reverse (2420200201), we get a palindrome (3440220443).

The spelling of 1020020242 in words is "one billion, twenty million, twenty thousand, two hundred forty-two".