13771056 has 80 divisors (see below), whose sum is σ = 39684960. Its totient is φ = 4085760.

The previous prime is 13771033. The next prime is 13771057. The reversal of 13771056 is 65017731.

It is not an unprimeable number, because it can be changed into a prime (13771057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17716 + ... + 18476.

It is an arithmetic number, because the mean of its divisors is an integer number (496062).

Almost surely, 2^13771056 is an apocalyptic number.

13771056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13771056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19842480).

13771056 is an abundant number, since it is smaller than the sum of its proper divisors (25913904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13771056 is a wasteful number, since it uses less digits than its factorization.

13771056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 13771056 is about 3710.9373478947. The cubic root of 13771056 is about 239.6932191344.

Adding to 13771056 its reverse (65017731), we get a palindrome (78788787).

The spelling of 13771056 in words is "thirteen million, seven hundred seventy-one thousand, fifty-six".