13128417 has 6 divisors (see below), whose sum is σ = 18963282. Its totient is φ = 8752272.

The previous prime is 13128413. The next prime is 13128419. The reversal of 13128417 is 71482131.

13128417 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in only one way, i.e., 7750656 + 5377761 = 2784^2 + 2319^2 .

It is not a de Polignac number, because 13128417 - 2² = 13128413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13128413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 729348 + ... + 729365.

It is an arithmetic number, because the mean of its divisors is an integer number (3160547).

Almost surely, 2^13128417 is an apocalyptic number.

It is an amenable number.

13128417 is a deficient number, since it is larger than the sum of its proper divisors (5834865).

13128417 is a wasteful number, since it uses less digits than its factorization.

13128417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458719 (or 1458716 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13128417 is about 3623.3157466608. The cubic root of 13128417 is about 235.9051675385.

The spelling of 13128417 in words is "thirteen million, one hundred twenty-eight thousand, four hundred seventeen".