30145172 has 12 divisors (see below), whose sum is σ = 55530720. Its totient is φ = 14279256.

The previous prime is 30145169. The next prime is 30145207. The reversal of 30145172 is 27154103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198248 + ... + 198399.

It is an arithmetic number, because the mean of its divisors is an integer number (4627560).

Almost surely, 2^30145172 is an apocalyptic number.

It is an amenable number.

30145172 is a deficient number, since it is larger than the sum of its proper divisors (25385548).

30145172 is a wasteful number, since it uses less digits than its factorization.

30145172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396670 (or 396668 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 30145172 is about 5490.4619113514. The cubic root of 30145172 is about 311.2236478176.

Adding to 30145172 its reverse (27154103), we get a palindrome (57299275).

The spelling of 30145172 in words is "thirty million, one hundred forty-five thousand, one hundred seventy-two".