721348 has 6 divisors (see below), whose sum is σ = 1262366. Its totient is φ = 360672.

The previous prime is 721337. The next prime is 721351. The reversal of 721348 is 843127.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 248004 = 688^2 + 498^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90165 + ... + 90172.

2⁷²¹³⁴⁸ is an apocalyptic number.

It is an amenable number.

721348 is a deficient number, since it is larger than the sum of its proper divisors (541018).

721348 is a wasteful number, since it uses less digits than its factorization.

721348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180341 (or 180339 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 721348 is about 849.3220826047. The cubic root of 721348 is about 89.6839946304.

The spelling of 721348 in words is "seven hundred twenty-one thousand, three hundred forty-eight".