13220752 has 20 divisors (see below), whose sum is σ = 26499420. Its totient is φ = 6382208.

The previous prime is 13220749. The next prime is 13220773. The reversal of 13220752 is 25702231.

13220752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6990736 + 6230016 = 2644^2 + 2496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13783 + ... + 14710.

It is an arithmetic number, because the mean of its divisors is an integer number (1324971).

Almost surely, 2^13220752 is an apocalyptic number.

It is an amenable number.

13220752 is an abundant number, since it is smaller than the sum of its proper divisors (13278668).

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

13220752 is a wasteful number, since it uses less digits than its factorization.

13220752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28530 (or 28524 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13220752 is about 3636.0352033499. The cubic root of 13220752 is about 236.4569333682.

Adding to 13220752 its reverse (25702231), we get a palindrome (38922983).

The spelling of 13220752 in words is "thirteen million, two hundred twenty thousand, seven hundred fifty-two".