1302442021 has 4 divisors (see below), whose sum is σ = 1308614944. Its totient is φ = 1296269100.

The previous prime is 1302442019. The next prime is 1302442079. The reversal of 1302442021 is 1202442031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1302442021 - 2¹ = 1302442019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1302442021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302442621) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3086145 + ... + 3086566.

It is an arithmetic number, because the mean of its divisors is an integer number (327153736).

Almost surely, 2^1302442021 is an apocalyptic number.

It is an amenable number.

1302442021 is a deficient number, since it is larger than the sum of its proper divisors (6172923).

1302442021 is an equidigital number, since it uses as much as digits as its factorization.

1302442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172922.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1302442021 is about 36089.3616042179. The cubic root of 1302442021 is about 1092.0758413270.

Adding to 1302442021 its reverse (1202442031), we get a palindrome (2504884052).

The spelling of 1302442021 in words is "one billion, three hundred two million, four hundred forty-two thousand, twenty-one".