12542165 has 4 divisors (see below), whose sum is σ = 15050604. Its totient is φ = 10033728.

The previous prime is 12542143. The next prime is 12542177. The reversal of 12542165 is 56124521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8708401 + 3833764 = 2951^2 + 1958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12542165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254212 + ... + 1254221.

It is an arithmetic number, because the mean of its divisors is an integer number (3762651).

Almost surely, 2^12542165 is an apocalyptic number.

It is an amenable number.

12542165 is a deficient number, since it is larger than the sum of its proper divisors (2508439).

12542165 is an equidigital number, since it uses as much as digits as its factorization.

12542165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508438.

The product of its digits is 2400, while the sum is 26.

The square root of 12542165 is about 3541.4919172575. The cubic root of 12542165 is about 232.3400989412.

Adding to 12542165 its reverse (56124521), we get a palindrome (68666686).

The spelling of 12542165 in words is "twelve million, five hundred forty-two thousand, one hundred sixty-five".