7258561 has 4 divisors (see below), whose sum is σ = 7300692. Its totient is φ = 7216432.

The previous prime is 7258519. The next prime is 7258571. The reversal of 7258561 is 1658527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1658527 = 13 ⋅127579.

It can be written as a sum of positive squares in 2 ways, for example, as 5452225 + 1806336 = 2335^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 7258561 - 2⁹ = 7258049 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7258571) 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 3 ways as a sum of consecutive naturals, for example, 20806 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (1825173).

Almost surely, 2^7258561 is an apocalyptic number.

It is an amenable number.

7258561 is a deficient number, since it is larger than the sum of its proper divisors (42131).

7258561 is a wasteful number, since it uses less digits than its factorization.

7258561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42130.

The product of its digits is 16800, while the sum is 34.

The square root of 7258561 is about 2694.1716723327. The cubic root of 7258561 is about 193.6199826976.

Subtracting from 7258561 its sum of digits (34), we obtain a palindrome (7258527).

The spelling of 7258561 in words is "seven million, two hundred fifty-eight thousand, five hundred sixty-one".