30507121 has 2 divisors, whose sum is σ = 30507122. Its totient is φ = 30507120.

The previous prime is 30507107. The next prime is 30507143. The reversal of 30507121 is 12170503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 7840000 = 4761^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 30507121 - 2¹⁹ = 29982833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30507161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15253560 + 15253561.

It is an arithmetic number, because the mean of its divisors is an integer number (15253561).

Almost surely, 2^30507121 is an apocalyptic number.

It is an amenable number.

30507121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30507121 is an equidigital number, since it uses as much as digits as its factorization.

30507121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 30507121 is about 5523.3251760149. The cubic root of 30507121 is about 312.4643022690.

Adding to 30507121 its reverse (12170503), we get a palindrome (42677624).

It can be divided in two parts, 30507 and 121, that added together give a triangular number (30628 = T₂₄₇).

The spelling of 30507121 in words is "thirty million, five hundred seven thousand, one hundred twenty-one".