12715551 has 12 divisors (see below), whose sum is σ = 18530928. Its totient is φ = 8401344.

The previous prime is 12715537. The next prime is 12715561. The reversal of 12715551 is 15551721.

It is a de Polignac number, because none of the positive numbers 2^k-12715551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12715501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5235 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (1544244).

Almost surely, 2^12715551 is an apocalyptic number.

12715551 is a deficient number, since it is larger than the sum of its proper divisors (5815377).

12715551 is a wasteful number, since it uses less digits than its factorization.

12715551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12622 (or 12619 counting only the distinct ones).

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

The square root of 12715551 is about 3565.8871266489. The cubic root of 12715551 is about 233.4058452639.

The spelling of 12715551 in words is "twelve million, seven hundred fifteen thousand, five hundred fifty-one".