7275520 has 132 divisors (see below), whose sum is σ = 21002220. Its totient is φ = 2408448.

The previous prime is 7275511. The next prime is 7275529. The reversal of 7275520 is 255727.

It is an interprime number because it is at equal distance from previous prime (7275511) and next prime (7275529).

It can be written as a sum of positive squares in 2 ways, for example, as 3211264 + 4064256 = 1792^2 + 2016^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7275529) 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 11 ways as a sum of consecutive naturals, for example, 250866 + ... + 250894.

Almost surely, 2^7275520 is an apocalyptic number.

7275520 is a gapful number since it is divisible by the number (70) 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 7275520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10501110).

7275520 is an abundant number, since it is smaller than the sum of its proper divisors (13726700).

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

7275520 is a wasteful number, since it uses less digits than its factorization.

7275520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 7275520 is about 2697.3171856495. The cubic root of 7275520 is about 193.7706575269.

The spelling of 7275520 in words is "seven million, two hundred seventy-five thousand, five hundred twenty".