12145172 has 24 divisors (see below), whose sum is σ = 22993152. Its totient is φ = 5580000.

The previous prime is 12145163. The next prime is 12145183. The reversal of 12145172 is 27154121.

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, 15797 + ... + 16547.

It is an arithmetic number, because the mean of its divisors is an integer number (958048).

Almost surely, 2^12145172 is an apocalyptic number.

It is an amenable number.

12145172 is a deficient number, since it is larger than the sum of its proper divisors (10847980).

12145172 is a wasteful number, since it uses less digits than its factorization.

12145172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1077 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 12145172 is about 3484.9923959745. The cubic root of 12145172 is about 229.8623751329.

Adding to 12145172 its reverse (27154121), we get a palindrome (39299293).

The spelling of 12145172 in words is "twelve million, one hundred forty-five thousand, one hundred seventy-two".