7544721 has 8 divisors (see below), whose sum is σ = 10075104. Its totient is φ = 5022080.

The previous prime is 7544701. The next prime is 7544723. The reversal of 7544721 is 1274457.

7544721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 7544721 - 2⁶ = 7544657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7544723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (1259388).

Almost surely, 2^7544721 is an apocalyptic number.

It is an amenable number.

7544721 is a deficient number, since it is larger than the sum of its proper divisors (2530383).

7544721 is a wasteful number, since it uses less digits than its factorization.

7544721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its digits is 7840, while the sum is 30.

The square root of 7544721 is about 2746.7655524271. The cubic root of 7544721 is about 196.1316708614.

The spelling of 7544721 in words is "seven million, five hundred forty-four thousand, seven hundred twenty-one".