13261057 has 4 divisors (see below), whose sum is σ = 13281840. Its totient is φ = 13240276.

The previous prime is 13261051. The next prime is 13261063. The reversal of 13261057 is 75016231.

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: 75016231 = 89 ⋅842879.

It is an interprime number because it is at equal distance from previous prime (13261051) and next prime (13261063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13261057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9403 + ... + 10720.

It is an arithmetic number, because the mean of its divisors is an integer number (3320460).

Almost surely, 2^13261057 is an apocalyptic number.

It is an amenable number.

13261057 is a deficient number, since it is larger than the sum of its proper divisors (20783).

13261057 is an equidigital number, since it uses as much as digits as its factorization.

13261057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20782.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 13261057 is about 3641.5734236728. The cubic root of 13261057 is about 236.6969784183.

Adding to 13261057 its reverse (75016231), we get a palindrome (88277288).

The spelling of 13261057 in words is "thirteen million, two hundred sixty-one thousand, fifty-seven".