12551571 has 32 divisors (see below), whose sum is σ = 20064000. Its totient is φ = 7729344.

The previous prime is 12551569. The next prime is 12551587. The reversal of 12551571 is 17515521.

12551571 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12551571 - 2¹ = 12551569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12551501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21775 + ... + 22343.

It is an arithmetic number, because the mean of its divisors is an integer number (627000).

Almost surely, 2^12551571 is an apocalyptic number.

12551571 is a deficient number, since it is larger than the sum of its proper divisors (7512429).

12551571 is a wasteful number, since it uses less digits than its factorization.

12551571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 12551571 is about 3542.8196397785. The cubic root of 12551571 is about 232.3981656010.

The spelling of 12551571 in words is "twelve million, five hundred fifty-one thousand, five hundred seventy-one".