7120530 has 48 divisors (see below), whose sum is σ = 18831384. Its totient is φ = 1866240.

The previous prime is 7120523. The next prime is 7120537. The reversal of 7120530 is 350217.

It is an interprime number because it is at equal distance from previous prime (7120523) and next prime (7120537).

It can be written as a sum of positive squares in 4 ways, for example, as 6036849 + 1083681 = 2457^2 + 1041^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (7120537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4842 + ... + 6138.

Almost surely, 2^7120530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7120530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9415692).

7120530 is an abundant number, since it is smaller than the sum of its proper divisors (11710854).

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

7120530 is a wasteful number, since it uses less digits than its factorization.

7120530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 7120530 is about 2668.4321239260. The cubic root of 7120530 is about 192.3848076777.

Adding to 7120530 its reverse (350217), we get a palindrome (7470747).

The spelling of 7120530 in words is "seven million, one hundred twenty thousand, five hundred thirty".