4283721 has 48 divisors (see below), whose sum is σ = 7338240. Its totient is φ = 2384640.

The previous prime is 4283707. The next prime is 4283723. The reversal of 4283721 is 1273824.

It is not a de Polignac number, because 4283721 - 2⁵ = 4283689 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 4⁸ + 2²¹ + 8³ + 3⁸ + 7⁵ + 2²¹ + 1 .

It is not an unprimeable number, because it can be changed into a prime (4283723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91120 + ... + 91166.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

Almost surely, 2^4283721 is an apocalyptic number.

4283721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4283721 is a deficient number, since it is larger than the sum of its proper divisors (3054519).

4283721 is a wasteful number, since it uses less digits than its factorization.

4283721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 123 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 4283721 is about 2069.7151977990. The cubic root of 4283721 is about 162.4078657203.

The spelling of 4283721 in words is "four million, two hundred eighty-three thousand, seven hundred twenty-one".