7213120 has 28 divisors (see below), whose sum is σ = 17177004. Its totient is φ = 2885120.

The previous prime is 7213097. The next prime is 7213123. The reversal of 7213120 is 213127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4227136 + 2985984 = 2056^2 + 1728^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 7213094 and 7213103.

It is not an unprimeable number, because it can be changed into a prime (7213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10951 + ... + 11590.

Almost surely, 2^7213120 is an apocalyptic number.

It is an amenable number.

7213120 is an abundant number, since it is smaller than the sum of its proper divisors (9963884).

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

7213120 is a wasteful number, since it uses less digits than its factorization.

7213120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22558 (or 22548 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 7213120 is about 2685.7252279412. The cubic root of 7213120 is about 193.2150948317.

Adding to 7213120 its reverse (213127), we get a palindrome (7426247).

The spelling of 7213120 in words is "seven million, two hundred thirteen thousand, one hundred twenty".