12562220 has 72 divisors (see below), whose sum is σ = 30164400. Its totient is φ = 4385920.

The previous prime is 12562183. The next prime is 12562237. The reversal of 12562220 is 2226521.

12562220 = T₈₅₆ + T₈₅₇ + ... + T₈₈₈.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12562192 and 12562201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70091 + ... + 70269.

It is an arithmetic number, because the mean of its divisors is an integer number (418950).

Almost surely, 2^12562220 is an apocalyptic number.

12562220 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 12562220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15082200).

12562220 is an abundant number, since it is smaller than the sum of its proper divisors (17602180).

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

12562220 is a wasteful number, since it uses less digits than its factorization.

12562220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12562220 is about 3544.3222201149. The cubic root of 12562220 is about 232.4638707494.

Adding to 12562220 its reverse (2226521), we get a palindrome (14788741).

The spelling of 12562220 in words is "twelve million, five hundred sixty-two thousand, two hundred twenty".