6701721 has 16 divisors (see below), whose sum is σ = 9678144. Its totient is φ = 4100544.

The previous prime is 6701713. The next prime is 6701729. The reversal of 6701721 is 1271076.

It is an interprime number because it is at equal distance from previous prime (6701713) and next prime (6701729).

It is not a de Polignac number, because 6701721 - 2³ = 6701713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6701691 and 6701700.

It is not an unprimeable number, because it can be changed into a prime (6701729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8475 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (604884).

Almost surely, 2^6701721 is an apocalyptic number.

It is an amenable number.

6701721 is a deficient number, since it is larger than the sum of its proper divisors (2976423).

6701721 is a wasteful number, since it uses less digits than its factorization.

6701721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 6701721 is about 2588.7682399164. The cubic root of 6701721 is about 188.5365031901.

Adding to 6701721 its reverse (1271076), we get a palindrome (7972797).

The spelling of 6701721 in words is "six million, seven hundred one thousand, seven hundred twenty-one".