12541665 has 32 divisors (see below), whose sum is σ = 21461760. Its totient is φ = 6232064.

The previous prime is 12541651. The next prime is 12541667. The reversal of 12541665 is 56614521.

It is not a de Polignac number, because 12541665 - 2⁷ = 12541537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12541667) 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, 34756 + ... + 35114.

It is an arithmetic number, because the mean of its divisors is an integer number (670680).

Almost surely, 2^12541665 is an apocalyptic number.

12541665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12541665 is a deficient number, since it is larger than the sum of its proper divisors (8920095).

12541665 is a wasteful number, since it uses less digits than its factorization.

12541665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its digits is 7200, while the sum is 30.

The square root of 12541665 is about 3541.4213248356. The cubic root of 12541665 is about 232.3370114467.

The spelling of 12541665 in words is "twelve million, five hundred forty-one thousand, six hundred sixty-five".