30120517 has 4 divisors (see below), whose sum is σ = 34423456. Its totient is φ = 25817580.

The previous prime is 30120487. The next prime is 30120533. The reversal of 30120517 is 71502103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71502103 = 5651 ⋅12653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30120517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30120494 and 30120503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151459 + ... + 2151472.

It is an arithmetic number, because the mean of its divisors is an integer number (8605864).

Almost surely, 2^30120517 is an apocalyptic number.

It is an amenable number.

30120517 is a deficient number, since it is larger than the sum of its proper divisors (4302939).

30120517 is an equidigital number, since it uses as much as digits as its factorization.

30120517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302938.

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

The square root of 30120517 is about 5488.2161947212. The cubic root of 30120517 is about 311.1387772685.

The spelling of 30120517 in words is "thirty million, one hundred twenty thousand, five hundred seventeen".