30021045 has 16 divisors (see below), whose sum is σ = 50562240. Its totient is φ = 15168384.

The previous prime is 30021041. The next prime is 30021053. The reversal of 30021045 is 54012003.

It is not a de Polignac number, because 30021045 - 2² = 30021041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021041) 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 15 ways as a sum of consecutive naturals, for example, 52384 + ... + 52953.

It is an arithmetic number, because the mean of its divisors is an integer number (3160140).

Almost surely, 2^30021045 is an apocalyptic number.

It is an amenable number.

30021045 is a deficient number, since it is larger than the sum of its proper divisors (20541195).

30021045 is a wasteful number, since it uses less digits than its factorization.

30021045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105364.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30021045 is about 5479.1463751209. The cubic root of 30021045 is about 310.7958910657.

Adding to 30021045 its reverse (54012003), we get a palindrome (84033048).

The spelling of 30021045 in words is "thirty million, twenty-one thousand, forty-five".