4062721 has 4 divisors (see below), whose sum is σ = 4375252. Its totient is φ = 3750192.

The previous prime is 4062701. The next prime is 4062749. The reversal of 4062721 is 1272604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 1290496 = 1665^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 4062721 - 2¹⁷ = 3931649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4062692 and 4062701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4062701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156246 + ... + 156271.

It is an arithmetic number, because the mean of its divisors is an integer number (1093813).

Almost surely, 2^4062721 is an apocalyptic number.

It is an amenable number.

4062721 is a deficient number, since it is larger than the sum of its proper divisors (312531).

4062721 is a wasteful number, since it uses less digits than its factorization.

4062721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312530.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4062721 is about 2015.6192596817. The cubic root of 4062721 is about 159.5655008210.

The spelling of 4062721 in words is "four million, sixty-two thousand, seven hundred twenty-one".