12685572 has 72 divisors (see below), whose sum is σ = 34408192. Its totient is φ = 4082400.

The previous prime is 12685567. The next prime is 12685573. The reversal of 12685572 is 27558621.

It is a happy number.

12685572 is a `hidden beast` number, since 1 + 2 + 6 + 85 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12685573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29922 + ... + 30342.

Almost surely, 2^12685572 is an apocalyptic number.

12685572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12685572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17204096).

12685572 is an abundant number, since it is smaller than the sum of its proper divisors (21722620).

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

12685572 is a wasteful number, since it uses less digits than its factorization.

12685572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 457 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 12685572 is about 3561.6810637675. The cubic root of 12685572 is about 233.2222700464. Note that the first 4 decimals are identical.

It can be divided in two parts, 12 and 685572, that added together give a square (685584 = 828²).

The spelling of 12685572 in words is "twelve million, six hundred eighty-five thousand, five hundred seventy-two".