13280357 has 4 divisors (see below), whose sum is σ = 13296780. Its totient is φ = 13263936.

The previous prime is 13280353. The next prime is 13280359. The reversal of 13280357 is 75308231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75308231 = 2477 ⋅30403.

It can be written as a sum of positive squares in 2 ways, for example, as 2515396 + 10764961 = 1586^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 13280357 - 2² = 13280353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280353) 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 3 ways as a sum of consecutive naturals, for example, 6932 + ... + 8637.

It is an arithmetic number, because the mean of its divisors is an integer number (3324195).

Almost surely, 2^13280357 is an apocalyptic number.

It is an amenable number.

13280357 is a deficient number, since it is larger than the sum of its proper divisors (16423).

13280357 is an equidigital number, since it uses as much as digits as its factorization.

13280357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16422.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13280357 is about 3644.2224136296. Note that the first 3 decimals coincide. The cubic root of 13280357 is about 236.8117515036.

Adding to 13280357 its reverse (75308231), we get a palindrome (88588588).

The spelling of 13280357 in words is "thirteen million, two hundred eighty thousand, three hundred fifty-seven".