7288561 has 4 divisors (see below), whose sum is σ = 8329792. Its totient is φ = 6247332.

The previous prime is 7288559. The next prime is 7288577. The reversal of 7288561 is 1658827.

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.

It is not a de Polignac number, because 7288561 - 2¹ = 7288559 is a prime.

It is a super-3 number, since 3×7288561³ (a number of 22 digits) contains 333 as substring.

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 7288561.

It is not an unprimeable number, because it can be changed into a prime (7288511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520605 + ... + 520618.

It is an arithmetic number, because the mean of its divisors is an integer number (2082448).

Almost surely, 2^7288561 is an apocalyptic number.

It is an amenable number.

7288561 is a deficient number, since it is larger than the sum of its proper divisors (1041231).

7288561 is a wasteful number, since it uses less digits than its factorization.

7288561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041230.

The product of its digits is 26880, while the sum is 37.

The square root of 7288561 is about 2699.7335053668. The cubic root of 7288561 is about 193.8863631089.

The spelling of 7288561 in words is "seven million, two hundred eighty-eight thousand, five hundred sixty-one".