30060721 has 2 divisors, whose sum is σ = 30060722. Its totient is φ = 30060720.

The previous prime is 30060713. The next prime is 30060757. The reversal of 30060721 is 12706003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28772496 + 1288225 = 5364^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 30060721 - 2³ = 30060713 is a prime.

It is not a weakly prime, because it can be changed into another prime (30060221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15030360 + 15030361.

It is an arithmetic number, because the mean of its divisors is an integer number (15030361).

Almost surely, 2^30060721 is an apocalyptic number.

It is an amenable number.

30060721 is a deficient number, since it is larger than the sum of its proper divisors (1).

30060721 is an equidigital number, since it uses as much as digits as its factorization.

30060721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30060721 is about 5482.7658166294. The cubic root of 30060721 is about 310.9327473883.

Adding to 30060721 its reverse (12706003), we get a palindrome (42766724).

The spelling of 30060721 in words is "thirty million, sixty thousand, seven hundred twenty-one".