12653220 has 96 divisors (see below), whose sum is σ = 37884672. Its totient is φ = 3148288.

The previous prime is 12653203. The next prime is 12653227. The reversal of 12653220 is 2235621.

It is not an unprimeable number, because it can be changed into a prime (12653227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73054 + ... + 73226.

It is an arithmetic number, because the mean of its divisors is an integer number (394632).

Almost surely, 2^12653220 is an apocalyptic number.

12653220 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 12653220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18942336).

12653220 is an abundant number, since it is smaller than the sum of its proper divisors (25231452).

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

12653220 is a wasteful number, since it uses less digits than its factorization.

12653220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12653220 is about 3557.1364888067. The cubic root of 12653220 is about 233.0238391003.

Adding to 12653220 its reverse (2235621), we get a palindrome (14888841).

The spelling of 12653220 in words is "twelve million, six hundred fifty-three thousand, two hundred twenty".