30120745 has 4 divisors (see below), whose sum is σ = 36144900. Its totient is φ = 24096592.

The previous prime is 30120743. The next prime is 30120767. The reversal of 30120745 is 54702103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 19545241 = 3252^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 30120745 - 2¹ = 30120743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30120743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3012070 + ... + 3012079.

It is an arithmetic number, because the mean of its divisors is an integer number (9036225).

Almost surely, 2^30120745 is an apocalyptic number.

It is an amenable number.

30120745 is a deficient number, since it is larger than the sum of its proper divisors (6024155).

30120745 is an equidigital number, since it uses as much as digits as its factorization.

30120745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6024154.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30120745 is about 5488.2369664584. The cubic root of 30120745 is about 311.1395623310.

Adding to 30120745 its reverse (54702103), we get a palindrome (84822848).

The spelling of 30120745 in words is "thirty million, one hundred twenty thousand, seven hundred forty-five".