7336721 has 6 divisors (see below), whose sum is σ = 8534610. Its totient is φ = 6288576.

The previous prime is 7336711. The next prime is 7336727. The reversal of 7336721 is 1276337.

7336721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7075600 + 261121 = 2660^2 + 511^2 .

It is not a de Polignac number, because 7336721 - 2⁶ = 7336657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7336727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74816 + ... + 74913.

It is an arithmetic number, because the mean of its divisors is an integer number (1422435).

Almost surely, 2^7336721 is an apocalyptic number.

It is an amenable number.

7336721 is a deficient number, since it is larger than the sum of its proper divisors (1197889).

7336721 is a wasteful number, since it uses less digits than its factorization.

7336721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149743 (or 149736 counting only the distinct ones).

The product of its digits is 5292, while the sum is 29.

The square root of 7336721 is about 2708.6382187365. The cubic root of 7336721 is about 194.3124680728.

The spelling of 7336721 in words is "seven million, three hundred thirty-six thousand, seven hundred twenty-one".