13171620 has 96 divisors (see below), whose sum is σ = 45997056. Its totient is φ = 2736000.

The previous prime is 13171607. The next prime is 13171637. The reversal of 13171620 is 2617131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3195 + ... + 6045.

It is an arithmetic number, because the mean of its divisors is an integer number (479136).

Almost surely, 2^13171620 is an apocalyptic number.

13171620 is a gapful number since it is divisible by the number (10) 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 13171620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22998528).

13171620 is an abundant number, since it is smaller than the sum of its proper divisors (32825436).

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

13171620 is a wasteful number, since it uses less digits than its factorization.

13171620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881 (or 2879 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 13171620 is about 3629.2726544034. The cubic root of 13171620 is about 236.1636564741.

Adding to 13171620 its reverse (2617131), we get a palindrome (15788751).

The spelling of 13171620 in words is "thirteen million, one hundred seventy-one thousand, six hundred twenty".