302401021 has 4 divisors (see below), whose sum is σ = 325662652. Its totient is φ = 279139392.

The previous prime is 302401007. The next prime is 302401039. The reversal of 302401021 is 120104203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120104203 = 43 ⋅2793121.

It can be written as a sum of positive squares in 2 ways, for example, as 106708900 + 195692121 = 10330^2 + 13989^2 .

It is a cyclic number.

It is not a de Polignac number, because 302401021 - 2⁹ = 302400509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 23261617 = 302401021 / (3 + 0 + 2 + 4 + 0 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302400992 and 302401010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302401081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11630796 + ... + 11630821.

It is an arithmetic number, because the mean of its divisors is an integer number (81415663).

Almost surely, 2^302401021 is an apocalyptic number.

It is an amenable number.

302401021 is a deficient number, since it is larger than the sum of its proper divisors (23261631).

302401021 is a wasteful number, since it uses less digits than its factorization.

302401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23261630.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 302401021 is about 17389.6814519416. The cubic root of 302401021 is about 671.2141206590.

Adding to 302401021 its reverse (120104203), we get a palindrome (422505224).

The spelling of 302401021 in words is "three hundred two million, four hundred one thousand, twenty-one".