12645887 has 4 divisors (see below), whose sum is σ = 13311480. Its totient is φ = 11980296.

The previous prime is 12645877. The next prime is 12645889. The reversal of 12645887 is 78854621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78854621 = 59 ⋅1336519.

It is a cyclic number.

It is not a de Polignac number, because 12645887 - 2¹⁸ = 12383743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332768 + ... + 332805.

It is an arithmetic number, because the mean of its divisors is an integer number (3327870).

Almost surely, 2^12645887 is an apocalyptic number.

12645887 is a deficient number, since it is larger than the sum of its proper divisors (665593).

12645887 is an equidigital number, since it uses as much as digits as its factorization.

12645887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665592.

The product of its digits is 107520, while the sum is 41.

The square root of 12645887 is about 3556.1055946077. The cubic root of 12645887 is about 232.9788151455.

The spelling of 12645887 in words is "twelve million, six hundred forty-five thousand, eight hundred eighty-seven".