7252809 has 4 divisors (see below), whose sum is σ = 9670416. Its totient is φ = 4835204.

The previous prime is 7252807. The next prime is 7252837. The reversal of 7252809 is 9082527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9082527 = 3 ⋅3027509.

It is a cyclic number.

It is not a de Polignac number, because 7252809 - 2¹ = 7252807 is a prime.

It is a super-3 number, since 3×7252809³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7252809.

It is not an unprimeable number, because it can be changed into a prime (7252801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208799 + ... + 1208804.

It is an arithmetic number, because the mean of its divisors is an integer number (2417604).

Almost surely, 2^7252809 is an apocalyptic number.

It is an amenable number.

7252809 is a deficient number, since it is larger than the sum of its proper divisors (2417607).

7252809 is a wasteful number, since it uses less digits than its factorization.

7252809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417606.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 7252809 is about 2693.1039712570. The cubic root of 7252809 is about 193.5688248785.

The spelling of 7252809 in words is "seven million, two hundred fifty-two thousand, eight hundred nine".