12171030 has 16 divisors (see below), whose sum is σ = 29210544. Its totient is φ = 3245600.

The previous prime is 12171023. The next prime is 12171041. The reversal of 12171030 is 3017121.

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

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, 202821 + ... + 202880.

It is an arithmetic number, because the mean of its divisors is an integer number (1825659).

Almost surely, 2^12171030 is an apocalyptic number.

12171030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12171030 is an abundant number, since it is smaller than the sum of its proper divisors (17039514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12171030 is a wasteful number, since it uses less digits than its factorization.

12171030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405711.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 12171030 is about 3488.7003310689. The cubic root of 12171030 is about 230.0253910217.

Adding to 12171030 its reverse (3017121), we get a palindrome (15188151).

The spelling of 12171030 in words is "twelve million, one hundred seventy-one thousand, thirty".