1242303021 has 16 divisors (see below), whose sum is σ = 1899819520. Its totient is φ = 801485280.

The previous prime is 1242303001. The next prime is 1242303037. The reversal of 1242303021 is 1203032421.

It is not a de Polignac number, because 1242303021 - 2⁵ = 1242302989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242302985 and 1242303003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242303001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741280 + ... + 742953.

It is an arithmetic number, because the mean of its divisors is an integer number (118738720).

Almost surely, 2^1242303021 is an apocalyptic number.

It is an amenable number.

1242303021 is a deficient number, since it is larger than the sum of its proper divisors (657516499).

1242303021 is a wasteful number, since it uses less digits than its factorization.

1242303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484273 (or 1484267 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1242303021 is about 35246.3192546399. The cubic root of 1242303021 is about 1075.0017727752.

Adding to 1242303021 its reverse (1203032421), we get a palindrome (2445335442).

The spelling of 1242303021 in words is "one billion, two hundred forty-two million, three hundred three thousand, twenty-one".