30445421 has 2 divisors, whose sum is σ = 30445422. Its totient is φ = 30445420.

The previous prime is 30445417. The next prime is 30445451. The reversal of 30445421 is 12454403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18369796 + 12075625 = 4286^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 30445421 - 2² = 30445417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30445451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15222710 + 15222711.

It is an arithmetic number, because the mean of its divisors is an integer number (15222711).

Almost surely, 2^30445421 is an apocalyptic number.

It is an amenable number.

30445421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30445421 is an equidigital number, since it uses as much as digits as its factorization.

30445421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 30445421 is about 5517.7369455240. The cubic root of 30445421 is about 312.2535093066.

Adding to 30445421 its reverse (12454403), we get a palindrome (42899824).

The spelling of 30445421 in words is "thirty million, four hundred forty-five thousand, four hundred twenty-one".