30120645 has 8 divisors (see below), whose sum is σ = 48193056. Its totient is φ = 16064336.

The previous prime is 30120613. The next prime is 30120667. The reversal of 30120645 is 54602103.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30120645 - 2⁵ = 30120613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004007 + ... + 1004036.

It is an arithmetic number, because the mean of its divisors is an integer number (6024132).

Almost surely, 2^30120645 is an apocalyptic number.

It is an amenable number.

30120645 is a deficient number, since it is larger than the sum of its proper divisors (18072411).

30120645 is a wasteful number, since it uses less digits than its factorization.

30120645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008051.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30120645 is about 5488.2278560570. The cubic root of 30120645 is about 311.1392180058.

Adding to 30120645 its reverse (54602103), we get a palindrome (84722748).

The spelling of 30120645 in words is "thirty million, one hundred twenty thousand, six hundred forty-five".