12571668 has 36 divisors (see below), whose sum is σ = 32022900. Its totient is φ = 4158336.

The previous prime is 12571667. The next prime is 12571681. The reversal of 12571668 is 86617521.

It can be written as a sum of positive squares in 2 ways, for example, as 9809424 + 2762244 = 3132^2 + 1662^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12571667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3658 + ... + 6206.

It is an arithmetic number, because the mean of its divisors is an integer number (889525).

Almost surely, 2^12571668 is an apocalyptic number.

12571668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12571668 is an abundant number, since it is smaller than the sum of its proper divisors (19451232).

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

12571668 is a wasteful number, since it uses less digits than its factorization.

12571668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2691 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12571668 is about 3545.6548055331. The cubic root of 12571668 is about 232.5221345559.

The spelling of 12571668 in words is "twelve million, five hundred seventy-one thousand, six hundred sixty-eight".