13099521 has 8 divisors (see below), whose sum is σ = 17489920. Its totient is φ = 8721072.

The previous prime is 13099519. The next prime is 13099523. The reversal of 13099521 is 12599031.

13099521 is a nontrivial binomial coefficient, being equal to C(5119, 2).

It is an interprime number because it is at equal distance from previous prime (13099519) and next prime (13099523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13099521 - 2¹ = 13099519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13099523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 5118.

It is an arithmetic number, because the mean of its divisors is an integer number (2186240).

Almost surely, 2^13099521 is an apocalyptic number.

13099521 is the 5118-th triangular number.

It is an amenable number.

13099521 is a deficient number, since it is larger than the sum of its proper divisors (4390399).

13099521 is an equidigital number, since it uses as much as digits as its factorization.

13099521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 13099521 is about 3619.3260422349. The cubic root of 13099521 is about 235.7319625206.

The spelling of 13099521 in words is "thirteen million, ninety-nine thousand, five hundred twenty-one".