30141721 has 2 divisors, whose sum is σ = 30141722. Its totient is φ = 30141720.

The previous prime is 30141691. The next prime is 30141737. The reversal of 30141721 is 12714103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21261321 + 8880400 = 4611^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 30141721 - 2⁵ = 30141689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30141751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15070860 + 15070861.

It is an arithmetic number, because the mean of its divisors is an integer number (15070861).

Almost surely, 2^30141721 is an apocalyptic number.

It is an amenable number.

30141721 is a deficient number, since it is larger than the sum of its proper divisors (1).

30141721 is an equidigital number, since it uses as much as digits as its factorization.

30141721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 30141721 is about 5490.1476300733. The cubic root of 30141721 is about 311.2117711364.

Adding to 30141721 its reverse (12714103), we get a palindrome (42855824).

The spelling of 30141721 in words is "thirty million, one hundred forty-one thousand, seven hundred twenty-one".