302040021 has 8 divisors (see below), whose sum is σ = 404288064. Its totient is φ = 200576000.

The previous prime is 302040007. The next prime is 302040029. The reversal of 302040021 is 120040203.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 302040021 - 2¹⁹ = 301515733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 302039979 and 302040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302040029) 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 7 ways as a sum of consecutive naturals, for example, 195105 + ... + 196646.

It is an arithmetic number, because the mean of its divisors is an integer number (50536008).

Almost surely, 2^302040021 is an apocalyptic number.

It is an amenable number.

302040021 is a deficient number, since it is larger than the sum of its proper divisors (102248043).

302040021 is a wasteful number, since it uses less digits than its factorization.

302040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392011.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 302040021 is about 17379.2986337194. The cubic root of 302040021 is about 670.9469205223.

Adding to 302040021 its reverse (120040203), we get a palindrome (422080224).

The spelling of 302040021 in words is "three hundred two million, forty thousand, twenty-one".