13712257 has 8 divisors (see below), whose sum is σ = 14840000. Its totient is φ = 12594960.

The previous prime is 13712239. The next prime is 13712269. The reversal of 13712257 is 75221731.

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 13712257 - 2¹¹ = 13710209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13715257) 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 7 ways as a sum of consecutive naturals, for example, 244 + ... + 5242.

It is an arithmetic number, because the mean of its divisors is an integer number (1855000).

Almost surely, 2^13712257 is an apocalyptic number.

It is an amenable number.

13712257 is a deficient number, since it is larger than the sum of its proper divisors (1127743).

13712257 is a wasteful number, since it uses less digits than its factorization.

13712257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223.

The product of its digits is 2940, while the sum is 28.

The square root of 13712257 is about 3703.0064812258. The cubic root of 13712257 is about 239.3515888772.

Adding to 13712257 its reverse (75221731), we get a palindrome (88933988).

The spelling of 13712257 in words is "thirteen million, seven hundred twelve thousand, two hundred fifty-seven".