12605172 has 12 divisors (see below), whose sum is σ = 29412096. Its totient is φ = 4201720.

The previous prime is 12605171. The next prime is 12605183. The reversal of 12605172 is 27150621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×12605172² = 317780722299168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12605171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525204 + ... + 525227.

It is an arithmetic number, because the mean of its divisors is an integer number (2451008).

Almost surely, 2^12605172 is an apocalyptic number.

12605172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12605172 is an abundant number, since it is smaller than the sum of its proper divisors (16806924).

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

12605172 is a wasteful number, since it uses less digits than its factorization.

12605172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050438 (or 1050436 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12605172 is about 3550.3763180824. The cubic root of 12605172 is about 232.7285116049.

Adding to 12605172 its reverse (27150621), we get a palindrome (39755793).

The spelling of 12605172 in words is "twelve million, six hundred five thousand, one hundred seventy-two".