13721055 has 8 divisors (see below), whose sum is σ = 21953712. Its totient is φ = 7317888.

The previous prime is 13721051. The next prime is 13721063. The reversal of 13721055 is 55012731.

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

It is not a de Polignac number, because 13721055 - 2² = 13721051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721051) 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, 457354 + ... + 457383.

It is an arithmetic number, because the mean of its divisors is an integer number (2744214).

Almost surely, 2^13721055 is an apocalyptic number.

13721055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13721055 is a deficient number, since it is larger than the sum of its proper divisors (8232657).

13721055 is an equidigital number, since it uses as much as digits as its factorization.

13721055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914745.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 13721055 is about 3704.1942443668. The cubic root of 13721055 is about 239.4027685156.

Adding to 13721055 its reverse (55012731), we get a palindrome (68733786).

The spelling of 13721055 in words is "thirteen million, seven hundred twenty-one thousand, fifty-five".