12532991 has 4 divisors (see below), whose sum is σ = 12709584. Its totient is φ = 12356400.

The previous prime is 12532981. The next prime is 12532997. The reversal of 12532991 is 19923521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19923521 = 853 ⋅23357.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12532991 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 (12532997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88190 + ... + 88331.

It is an arithmetic number, because the mean of its divisors is an integer number (3177396).

Almost surely, 2^12532991 is an apocalyptic number.

12532991 is a deficient number, since it is larger than the sum of its proper divisors (176593).

12532991 is an equidigital number, since it uses as much as digits as its factorization.

12532991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176592.

The product of its digits is 4860, while the sum is 32.

The square root of 12532991 is about 3540.1964634749. The cubic root of 12532991 is about 232.2834365289.

The spelling of 12532991 in words is "twelve million, five hundred thirty-two thousand, nine hundred ninety-one".