13123660 has 96 divisors (see below), whose sum is σ = 33203520. Its totient is φ = 4336640.

The previous prime is 13123603. The next prime is 13123679. The reversal of 13123660 is 6632131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452526 + ... + 452554.

It is an arithmetic number, because the mean of its divisors is an integer number (345870).

Almost surely, 2^13123660 is an apocalyptic number.

13123660 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 13123660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16601760).

13123660 is an abundant number, since it is smaller than the sum of its proper divisors (20079860).

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

13123660 is a wasteful number, since it uses less digits than its factorization.

13123660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13123660 is about 3622.6592442569. The cubic root of 13123660 is about 235.8766711744.

Adding to 13123660 its reverse (6632131), we get a palindrome (19755791).

The spelling of 13123660 in words is "thirteen million, one hundred twenty-three thousand, six hundred sixty".