7038721 has 8 divisors (see below), whose sum is σ = 7470080. Its totient is φ = 6613488.

The previous prime is 7038719. The next prime is 7038751. The reversal of 7038721 is 1278307.

It is a happy number.

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 7038721 - 2¹ = 7038719 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7038721.

It is not an unprimeable number, because it can be changed into a prime (7038701) 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 7 ways as a sum of consecutive naturals, for example, 955 + ... + 3871.

It is an arithmetic number, because the mean of its divisors is an integer number (933760).

Almost surely, 2^7038721 is an apocalyptic number.

It is an amenable number.

7038721 is a deficient number, since it is larger than the sum of its proper divisors (431359).

7038721 is a wasteful number, since it uses less digits than its factorization.

7038721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 7038721 is about 2653.0588007053. The cubic root of 7038721 is about 191.6451870909.

The spelling of 7038721 in words is "seven million, thirty-eight thousand, seven hundred twenty-one".