721282 has 8 divisors (see below), whose sum is σ = 1107216. Its totient is φ = 352212.

The previous prime is 721267. The next prime is 721283. The reversal of 721282 is 282127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (721283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108 + ... + 4279.

It is an arithmetic number, because the mean of its divisors is an integer number (138402).

2⁷²¹²⁸² is an apocalyptic number.

721282 is a deficient number, since it is larger than the sum of its proper divisors (385934).

721282 is a wasteful number, since it uses less digits than its factorization.

721282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432.

The product of its digits is 448, while the sum is 22.

The square root of 721282 is about 849.2832271981. The cubic root of 721282 is about 89.6812593237.

The spelling of 721282 in words is "seven hundred twenty-one thousand, two hundred eighty-two".