13132921 has 4 divisors (see below), whose sum is σ = 13190500. Its totient is φ = 13075344.

The previous prime is 13132913. The next prime is 13132939. The reversal of 13132921 is 12923131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12923131 = 13 ⋅994087.

It can be written as a sum of positive squares in 2 ways, for example, as 10310521 + 2822400 = 3211^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 13132921 - 2³ = 13132913 is a prime.

It is a super-2 number, since 2×13132921² = 344947227984482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13132892 and 13132901.

It is not an unprimeable number, because it can be changed into a prime (13132901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28446 + ... + 28903.

It is an arithmetic number, because the mean of its divisors is an integer number (3297625).

Almost surely, 2^13132921 is an apocalyptic number.

It is an amenable number.

13132921 is a deficient number, since it is larger than the sum of its proper divisors (57579).

13132921 is an equidigital number, since it uses as much as digits as its factorization.

13132921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57578.

The product of its digits is 324, while the sum is 22.

The square root of 13132921 is about 3623.9372235181. The cubic root of 13132921 is about 235.9321419861.

The spelling of 13132921 in words is "thirteen million, one hundred thirty-two thousand, nine hundred twenty-one".