6290721 has 12 divisors (see below), whose sum is σ = 9108372. Its totient is φ = 4183776.

The previous prime is 6290701. The next prime is 6290743. The reversal of 6290721 is 1270926.

6290721 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 2 ways, for example, as 4260096 + 2030625 = 2064^2 + 1425^2 .

It is not a de Polignac number, because 6290721 - 2⁶ = 6290657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6290701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6735 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (759031).

Almost surely, 2^6290721 is an apocalyptic number.

It is an amenable number.

6290721 is a deficient number, since it is larger than the sum of its proper divisors (2817651).

6290721 is a wasteful number, since it uses less digits than its factorization.

6290721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 6290721 is about 2508.1309774412. The cubic root of 6290721 is about 184.6007557719.

The spelling of 6290721 in words is "six million, two hundred ninety thousand, seven hundred twenty-one".