12645571 has 8 divisors (see below), whose sum is σ = 12883104. Its totient is φ = 12409920.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645571 is 17554621.

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 12645571 - 2¹⁹ = 12121283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645271) 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, 22425 + ... + 22981.

It is an arithmetic number, because the mean of its divisors is an integer number (1610388).

Almost surely, 2^12645571 is an apocalyptic number.

12645571 is a deficient number, since it is larger than the sum of its proper divisors (237533).

12645571 is an equidigital number, since it uses as much as digits as its factorization.

12645571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 8400, while the sum is 31.

The square root of 12645571 is about 3556.0611637035. The cubic root of 12645571 is about 232.9768745430.

The spelling of 12645571 in words is "twelve million, six hundred forty-five thousand, five hundred seventy-one".