30147121 has 2 divisors, whose sum is σ = 30147122. Its totient is φ = 30147120.

The previous prime is 30147109. The next prime is 30147127. The reversal of 30147121 is 12174103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 10962721 = 4380^2 + 3311^2 .

It is a cyclic number.

It is not a de Polignac number, because 30147121 - 2⁹ = 30146609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30147127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15073560 + 15073561.

It is an arithmetic number, because the mean of its divisors is an integer number (15073561).

Almost surely, 2^30147121 is an apocalyptic number.

It is an amenable number.

30147121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30147121 is an equidigital number, since it uses as much as digits as its factorization.

30147121 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 30147121 is about 5490.6393981029. The cubic root of 30147121 is about 311.2303549371.

The spelling of 30147121 in words is "thirty million, one hundred forty-seven thousand, one hundred twenty-one".