12651601 has 4 divisors (see below), whose sum is σ = 12920832. Its totient is φ = 12382372.

The previous prime is 12651581. The next prime is 12651619. The reversal of 12651601 is 10615621.

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: 10615621 = 211 ⋅50311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12651601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12651631) 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, 134545 + ... + 134638.

It is an arithmetic number, because the mean of its divisors is an integer number (3230208).

Almost surely, 2^12651601 is an apocalyptic number.

It is an amenable number.

12651601 is a deficient number, since it is larger than the sum of its proper divisors (269231).

12651601 is an equidigital number, since it uses as much as digits as its factorization.

12651601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269230.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12651601 is about 3556.9089108382. The cubic root of 12651601 is about 233.0139000838.

The spelling of 12651601 in words is "twelve million, six hundred fifty-one thousand, six hundred one".