13121215 has 8 divisors (see below), whose sum is σ = 16253568. Its totient is φ = 10158240.

The previous prime is 13121209. The next prime is 13121219. The reversal of 13121215 is 51212131.

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

It is not a de Polignac number, because 13121215 - 2⁹ = 13120703 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 (13121219) 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, 42172 + ... + 42481.

It is an arithmetic number, because the mean of its divisors is an integer number (2031696).

Almost surely, 2^13121215 is an apocalyptic number.

13121215 is a deficient number, since it is larger than the sum of its proper divisors (3132353).

13121215 is an equidigital number, since it uses as much as digits as its factorization.

13121215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84689.

The product of its digits is 60, while the sum is 16.

The square root of 13121215 is about 3622.3217692524. The cubic root of 13121215 is about 235.8620219511.

Adding to 13121215 its reverse (51212131), we get a palindrome (64333346).

The spelling of 13121215 in words is "thirteen million, one hundred twenty-one thousand, two hundred fifteen".