5121220 has 24 divisors (see below), whose sum is σ = 11582424. Its totient is φ = 1890816.

The previous prime is 5121211. The next prime is 5121223. The reversal of 5121220 is 221215.

It can be written as a sum of positive squares in 4 ways, for example, as 31684 + 5089536 = 178^2 + 2256^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 5121220.

It is not an unprimeable number, because it can be changed into a prime (5121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9589 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (482601).

Almost surely, 2^5121220 is an apocalyptic number.

It is an amenable number.

5121220 is an abundant number, since it is smaller than the sum of its proper divisors (6461204).

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

5121220 is a wasteful number, since it uses less digits than its factorization.

5121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19719 (or 19717 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 5121220 is about 2263.0112682000. The cubic root of 5121220 is about 172.3684637525.

Adding to 5121220 its reverse (221215), we get a palindrome (5342435).

The spelling of 5121220 in words is "five million, one hundred twenty-one thousand, two hundred twenty".