3236721 has 16 divisors (see below), whose sum is σ = 4583040. Its totient is φ = 2027520.

The previous prime is 3236713. The next prime is 3236729. The reversal of 3236721 is 1276323.

3236721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3236713) and next prime (3236729).

It is not a de Polignac number, because 3236721 - 2³ = 3236713 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3236691 and 3236700.

It is not an unprimeable number, because it can be changed into a prime (3236729) 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 15 ways as a sum of consecutive naturals, for example, 3825 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (286440).

Almost surely, 2^3236721 is an apocalyptic number.

It is an amenable number.

3236721 is a deficient number, since it is larger than the sum of its proper divisors (1346319).

3236721 is a wasteful number, since it uses less digits than its factorization.

3236721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its digits is 1512, while the sum is 24.

The square root of 3236721 is about 1799.0889361007. The cubic root of 3236721 is about 147.9227896515.

The spelling of 3236721 in words is "three million, two hundred thirty-six thousand, seven hundred twenty-one".