30502421 has 2 divisors, whose sum is σ = 30502422. Its totient is φ = 30502420.

The previous prime is 30502411. The next prime is 30502441. The reversal of 30502421 is 12420503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29268100 + 1234321 = 5410^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 30502421 - 2¹⁴ = 30486037 is a prime.

It is a super-2 number, since 2×30502421² = 1860795373722482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30502421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30502411) 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 as a sum of consecutive naturals, namely, 15251210 + 15251211.

It is an arithmetic number, because the mean of its divisors is an integer number (15251211).

Almost surely, 2^30502421 is an apocalyptic number.

It is an amenable number.

30502421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30502421 is an equidigital number, since it uses as much as digits as its factorization.

30502421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30502421 is about 5522.8996912854. The cubic root of 30502421 is about 312.4482551124.

Adding to 30502421 its reverse (12420503), we get a palindrome (42922924).

The spelling of 30502421 in words is "thirty million, five hundred two thousand, four hundred twenty-one".