13148721 has 12 divisors (see below), whose sum is σ = 19111248. Its totient is φ = 8711064.

The previous prime is 13148711. The next prime is 13148731. The reversal of 13148721 is 12784131.

It is an interprime number because it is at equal distance from previous prime (13148711) and next prime (13148731).

It is not a de Polignac number, because 13148721 - 2⁵ = 13148689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13148711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3015 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (1592604).

Almost surely, 2^13148721 is an apocalyptic number.

It is an amenable number.

13148721 is a deficient number, since it is larger than the sum of its proper divisors (5962527).

13148721 is a wasteful number, since it uses less digits than its factorization.

13148721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132 (or 9129 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13148721 is about 3626.1165177087. The cubic root of 13148721 is about 236.0267194204.

The spelling of 13148721 in words is "thirteen million, one hundred forty-eight thousand, seven hundred twenty-one".