7725442 has 8 divisors (see below), whose sum is σ = 11652732. Its totient is φ = 3841200.

The previous prime is 7725433. The next prime is 7725449. The reversal of 7725442 is 2445277.

It can be written as a sum of positive squares in 2 ways, for example, as 7722841 + 2601 = 2779^2 + 51^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7725449) 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, 10309 + ... + 11032.

Almost surely, 2^7725442 is an apocalyptic number.

7725442 is a deficient number, since it is larger than the sum of its proper divisors (3927290).

7725442 is a wasteful number, since it uses less digits than its factorization.

7725442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21524.

The product of its digits is 15680, while the sum is 31.

The square root of 7725442 is about 2779.4679346954. The cubic root of 7725442 is about 197.6853315607.

The spelling of 7725442 in words is "seven million, seven hundred twenty-five thousand, four hundred forty-two".