12542147 has 8 divisors (see below), whose sum is σ = 13352400. Its totient is φ = 11746944.

The previous prime is 12542143. The next prime is 12542177. The reversal of 12542147 is 74124521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12542147 - 2² = 12542143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542143) 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 7 ways as a sum of consecutive naturals, for example, 2018 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (1669050).

Almost surely, 2^12542147 is an apocalyptic number.

12542147 is a deficient number, since it is larger than the sum of its proper divisors (810253).

12542147 is an equidigital number, since it uses as much as digits as its factorization.

12542147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7525.

The product of its digits is 2240, while the sum is 26.

The square root of 12542147 is about 3541.4893759547. The cubic root of 12542147 is about 232.3399877928.

Adding to 12542147 its reverse (74124521), we get a palindrome (86666668).

The spelling of 12542147 in words is "twelve million, five hundred forty-two thousand, one hundred forty-seven".