300421021 has 2 divisors, whose sum is σ = 300421022. Its totient is φ = 300421020.

The previous prime is 300421001. The next prime is 300421049. The reversal of 300421021 is 120124003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296218521 + 4202500 = 17211^2 + 2050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-300421021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 300420992 and 300421010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (300421001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150210510 + 150210511.

It is an arithmetic number, because the mean of its divisors is an integer number (150210511).

Almost surely, 2^300421021 is an apocalyptic number.

It is an amenable number.

300421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

300421021 is an equidigital number, since it uses as much as digits as its factorization.

300421021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 300421021 is about 17332.6576438814. The cubic root of 300421021 is about 669.7459651769.

Adding to 300421021 its reverse (120124003), we get a palindrome (420545024).

It can be divided in two parts, 3004 and 21021, that added together give a square (24025 = 155²).

The spelling of 300421021 in words is "three hundred million, four hundred twenty-one thousand, twenty-one".