13721451 has 8 divisors (see below), whose sum is σ = 18376080. Its totient is φ = 9107232.

The previous prime is 13721447. The next prime is 13721459. The reversal of 13721451 is 15412731.

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

It is not a de Polignac number, because 13721451 - 2² = 13721447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13721459) 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, 9300 + ... + 10673.

It is an arithmetic number, because the mean of its divisors is an integer number (2297010).

Almost surely, 2^13721451 is an apocalyptic number.

13721451 is a deficient number, since it is larger than the sum of its proper divisors (4654629).

13721451 is a wasteful number, since it uses less digits than its factorization.

13721451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20205.

The product of its digits is 840, while the sum is 24.

The square root of 13721451 is about 3704.2476969015. The cubic root of 13721451 is about 239.4050716083.

The spelling of 13721451 in words is "thirteen million, seven hundred twenty-one thousand, four hundred fifty-one".