7242561 has 32 divisors (see below), whose sum is σ = 11750400. Its totient is φ = 4389120.

The previous prime is 7242551. The next prime is 7242569. The reversal of 7242561 is 1652427.

It is not a de Polignac number, because 7242561 - 2⁹ = 7242049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3360) is a multiple of the sum of its prime divisors (560).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7242569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13975 + ... + 14483.

It is an arithmetic number, because the mean of its divisors is an integer number (367200).

Almost surely, 2^7242561 is an apocalyptic number.

It is an amenable number.

7242561 is a deficient number, since it is larger than the sum of its proper divisors (4507839).

7242561 is a wasteful number, since it uses less digits than its factorization.

7242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 560 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 7242561 is about 2691.2006614149. The cubic root of 7242561 is about 193.4776129379.

Adding to 7242561 its reverse (1652427), we get a palindrome (8894988).

The spelling of 7242561 in words is "seven million, two hundred forty-two thousand, five hundred sixty-one".