12643601 has 4 divisors (see below), whose sum is σ = 12655104. Its totient is φ = 12632100.

The previous prime is 12643573. The next prime is 12643613. The reversal of 12643601 is 10634621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10634621 = 41 ⋅259381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12643601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643661) 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, 3905 + ... + 6366.

It is an arithmetic number, because the mean of its divisors is an integer number (3163776).

Almost surely, 2^12643601 is an apocalyptic number.

It is an amenable number.

12643601 is a deficient number, since it is larger than the sum of its proper divisors (11503).

12643601 is a wasteful number, since it uses less digits than its factorization.

12643601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11502.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12643601 is about 3555.7841610536. The cubic root of 12643601 is about 232.9647757542.

The spelling of 12643601 in words is "twelve million, six hundred forty-three thousand, six hundred one".