13771261 has 4 divisors (see below), whose sum is σ = 15738592. Its totient is φ = 11803932.

The previous prime is 13771243. The next prime is 13771267. The reversal of 13771261 is 16217731.

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.

It is not a de Polignac number, because 13771261 - 2⁵ = 13771229 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 (13771267) 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, 983655 + ... + 983668.

It is an arithmetic number, because the mean of its divisors is an integer number (3934648).

Almost surely, 2^13771261 is an apocalyptic number.

It is an amenable number.

13771261 is a deficient number, since it is larger than the sum of its proper divisors (1967331).

13771261 is an equidigital number, since it uses as much as digits as its factorization.

13771261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967330.

The product of its digits is 1764, while the sum is 28.

The square root of 13771261 is about 3710.9649688457. The cubic root of 13771261 is about 239.6944085099.

Adding to 13771261 its reverse (16217731), we get a palindrome (29988992).

The spelling of 13771261 in words is "thirteen million, seven hundred seventy-one thousand, two hundred sixty-one".