12761320 has 128 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 4055040.

The previous prime is 12761317. The next prime is 12761321. The reversal of 12761320 is 2316721.

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

It is a junction number, because it is equal to n+sod(n) for n = 12761291 and 12761300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12761321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131512 + ... + 131608.

It is an arithmetic number, because the mean of its divisors is an integer number (277830).

Almost surely, 2^12761320 is an apocalyptic number.

12761320 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 12761320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17781120).

12761320 is an abundant number, since it is smaller than the sum of its proper divisors (22800920).

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

12761320 is a wasteful number, since it uses less digits than its factorization.

12761320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 12761320 is about 3572.2989796488. The cubic root of 12761320 is about 233.6855542165.

The spelling of 12761320 in words is "twelve million, seven hundred sixty-one thousand, three hundred twenty".