7265521 has 8 divisors (see below), whose sum is σ = 7384104. Its totient is φ = 7148160.

The previous prime is 7265519. The next prime is 7265537. The reversal of 7265521 is 1255627.

It can be written as a sum of positive squares in 4 ways, for example, as 960400 + 6305121 = 980^2 + 2511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7265521 - 2¹ = 7265519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7265521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7265221) 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, 24651 + ... + 24943.

It is an arithmetic number, because the mean of its divisors is an integer number (923013).

Almost surely, 2^7265521 is an apocalyptic number.

It is an amenable number.

7265521 is a deficient number, since it is larger than the sum of its proper divisors (118583).

7265521 is a wasteful number, since it uses less digits than its factorization.

7265521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its digits is 4200, while the sum is 28.

The square root of 7265521 is about 2695.4630399989. The cubic root of 7265521 is about 193.6818482468.

The spelling of 7265521 in words is "seven million, two hundred sixty-five thousand, five hundred twenty-one".