13012220 has 24 divisors (see below), whose sum is σ = 29428224. Its totient is φ = 4804416.

The previous prime is 13012217. The next prime is 13012229. The reversal of 13012220 is 2221031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24764 + ... + 25283.

It is an arithmetic number, because the mean of its divisors is an integer number (1226176).

Almost surely, 2^13012220 is an apocalyptic number.

13012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13012220 is an abundant number, since it is smaller than the sum of its proper divisors (16416004).

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

13012220 is a wasteful number, since it uses less digits than its factorization.

13012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50069 (or 50067 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 13012220 is about 3607.2454865174. The cubic root of 13012220 is about 235.2071208528.

Adding to 13012220 its reverse (2221031), we get a palindrome (15233251).

The spelling of 13012220 in words is "thirteen million, twelve thousand, two hundred twenty".