7242240 has 160 divisors (see below), whose sum is σ = 24748416. Its totient is φ = 1802240.

The previous prime is 7242233. The next prime is 7242241. The reversal of 7242240 is 422427.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (7242241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176620 + ... + 176660.

Almost surely, 2^7242240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7242240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12374208).

7242240 is an abundant number, since it is smaller than the sum of its proper divisors (17506176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7242240 is a wasteful number, since it uses less digits than its factorization.

7242240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 7242240 is about 2691.1410219459. The cubic root of 7242240 is about 193.4747545001.

Adding to 7242240 its reverse (422427), we get a palindrome (7664667).

The spelling of 7242240 in words is "seven million, two hundred forty-two thousand, two hundred forty".