13641215 has 8 divisors (see below), whose sum is σ = 18708000. Its totient is φ = 9353952.

The previous prime is 13641211. The next prime is 13641239. The reversal of 13641215 is 51214631.

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

It is a cyclic number.

It is not a de Polignac number, because 13641215 - 2² = 13641211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13641211) 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, 194840 + ... + 194909.

It is an arithmetic number, because the mean of its divisors is an integer number (2338500).

Almost surely, 2^13641215 is an apocalyptic number.

13641215 is a deficient number, since it is larger than the sum of its proper divisors (5066785).

13641215 is an equidigital number, since it uses as much as digits as its factorization.

13641215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389761.

The product of its digits is 720, while the sum is 23.

The square root of 13641215 is about 3693.4015487082. The cubic root of 13641215 is about 238.9375197752.

Adding to 13641215 its reverse (51214631), we get a palindrome (64855846).

The spelling of 13641215 in words is "thirteen million, six hundred forty-one thousand, two hundred fifteen".