7335721 has 4 divisors (see below), whose sum is σ = 7767252. Its totient is φ = 6904192.

The previous prime is 7335709. The next prime is 7335733. The reversal of 7335721 is 1275337.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7335709) and next prime (7335733).

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 3474496 = 1965^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 7335721 - 2⁷ = 7335593 is a prime.

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 7335721.

It is not an unprimeable number, because it can be changed into a prime (7335701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215740 + ... + 215773.

It is an arithmetic number, because the mean of its divisors is an integer number (1941813).

Almost surely, 2^7335721 is an apocalyptic number.

It is an amenable number.

7335721 is a deficient number, since it is larger than the sum of its proper divisors (431531).

7335721 is a wasteful number, since it uses less digits than its factorization.

7335721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431530.

The product of its digits is 4410, while the sum is 28.

The square root of 7335721 is about 2708.4536178417. The cubic root of 7335721 is about 194.3036393651.

The spelling of 7335721 in words is "seven million, three hundred thirty-five thousand, seven hundred twenty-one".