12520222 has 16 divisors (see below), whose sum is σ = 22064112. Its totient is φ = 5253120.

The previous prime is 12520219. The next prime is 12520237. The reversal of 12520222 is 22202521.

It is a junction number, because it is equal to n+sod(n) for n = 12520196 and 12520205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21603 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (1379007).

Almost surely, 2^12520222 is an apocalyptic number.

12520222 is a deficient number, since it is larger than the sum of its proper divisors (9543890).

12520222 is a wasteful number, since it uses less digits than its factorization.

12520222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43803.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12520222 is about 3538.3925729065. The cubic root of 12520222 is about 232.2045238664.

Adding to 12520222 its reverse (22202521), we get a palindrome (34722743).

The spelling of 12520222 in words is "twelve million, five hundred twenty thousand, two hundred twenty-two".