13712421 has 16 divisors (see below), whose sum is σ = 19652544. Its totient is φ = 8473344.

The previous prime is 13712417. The next prime is 13712423. The reversal of 13712421 is 12421731.

It is not a de Polignac number, because 13712421 - 2² = 13712417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13712423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (1228284).

Almost surely, 2^13712421 is an apocalyptic number.

It is an amenable number.

13712421 is a deficient number, since it is larger than the sum of its proper divisors (5940123).

13712421 is a wasteful number, since it uses less digits than its factorization.

13712421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100.

The product of its digits is 336, while the sum is 21.

The square root of 13712421 is about 3703.0286253282. The cubic root of 13712421 is about 239.3525430966.

The spelling of 13712421 in words is "thirteen million, seven hundred twelve thousand, four hundred twenty-one".