30450421 has 2 divisors, whose sum is σ = 30450422. Its totient is φ = 30450420.

The previous prime is 30450419. The next prime is 30450437. The reversal of 30450421 is 12405403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30404196 + 46225 = 5514^2 + 215^2 .

It is an emirp because it is prime and its reverse (12405403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30450421 - 2¹ = 30450419 is a prime.

Together with 30450419, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30450481) 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, 15225210 + 15225211.

It is an arithmetic number, because the mean of its divisors is an integer number (15225211).

Almost surely, 2^30450421 is an apocalyptic number.

It is an amenable number.

30450421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30450421 is an equidigital number, since it uses as much as digits as its factorization.

30450421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30450421 is about 5518.1900112265. The cubic root of 30450421 is about 312.2706019928.

Adding to 30450421 its reverse (12405403), we get a palindrome (42855824).

The spelling of 30450421 in words is "thirty million, four hundred fifty thousand, four hundred twenty-one".