12732961 has 4 divisors (see below), whose sum is σ = 13286592. Its totient is φ = 12179332.

The previous prime is 12732959. The next prime is 12732977. The reversal of 12732961 is 16923721.

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: 16923721 = 17 ⋅995513.

It is a cyclic number.

It is not a de Polignac number, because 12732961 - 2¹ = 12732959 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12732061) 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, 276781 + ... + 276826.

It is an arithmetic number, because the mean of its divisors is an integer number (3321648).

Almost surely, 2^12732961 is an apocalyptic number.

It is an amenable number.

12732961 is a deficient number, since it is larger than the sum of its proper divisors (553631).

12732961 is an equidigital number, since it uses as much as digits as its factorization.

12732961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553630.

The product of its digits is 4536, while the sum is 31.

The square root of 12732961 is about 3568.3274793662. The cubic root of 12732961 is about 233.5123223004.

The spelling of 12732961 in words is "twelve million, seven hundred thirty-two thousand, nine hundred sixty-one".