13260657 has 4 divisors (see below), whose sum is σ = 17680880. Its totient is φ = 8840436.

The previous prime is 13260649. The next prime is 13260677. The reversal of 13260657 is 75606231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75606231 = 3 ⋅25202077.

It is not a de Polignac number, because 13260657 - 2³ = 13260649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13260647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210107 + ... + 2210112.

It is an arithmetic number, because the mean of its divisors is an integer number (4420220).

Almost surely, 2^13260657 is an apocalyptic number.

It is an amenable number.

13260657 is a deficient number, since it is larger than the sum of its proper divisors (4420223).

13260657 is an equidigital number, since it uses as much as digits as its factorization.

13260657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420222.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 13260657 is about 3641.5185019439. The cubic root of 13260657 is about 236.6945985239.

Adding to 13260657 its reverse (75606231), we get a palindrome (88866888).

The spelling of 13260657 in words is "thirteen million, two hundred sixty thousand, six hundred fifty-seven".