12642545 has 8 divisors (see below), whose sum is σ = 15218880. Its totient is φ = 10082160.

The previous prime is 12642541. The next prime is 12642547. The reversal of 12642545 is 54524621.

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

It is not a de Polignac number, because 12642545 - 2² = 12642541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12642541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165 + ... + 5474.

It is an arithmetic number, because the mean of its divisors is an integer number (1902360).

Almost surely, 2^12642545 is an apocalyptic number.

It is an amenable number.

12642545 is a deficient number, since it is larger than the sum of its proper divisors (2576335).

12642545 is an equidigital number, since it uses as much as digits as its factorization.

12642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7975.

The product of its digits is 9600, while the sum is 29.

The square root of 12642545 is about 3555.6356675003. The cubic root of 12642545 is about 232.9582897947.

The spelling of 12642545 in words is "twelve million, six hundred forty-two thousand, five hundred forty-five".