721334 has 8 divisors (see below), whose sum is σ = 1100520. Its totient is φ = 354496.

The previous prime is 721333. The next prime is 721337. The reversal of 721334 is 433127.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721333) 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, 2939 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (137565).

2⁷²¹³³⁴ is an apocalyptic number.

721334 is a deficient number, since it is larger than the sum of its proper divisors (379186).

721334 is a wasteful number, since it uses less digits than its factorization.

721334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174.

The product of its digits is 504, while the sum is 20.

The square root of 721334 is about 849.3138406973. The cubic root of 721334 is about 89.6834144278.

The spelling of 721334 in words is "seven hundred twenty-one thousand, three hundred thirty-four".