721094 has 16 divisors (see below), whose sum is σ = 1198800. Its totient is φ = 322560.

The previous prime is 721087. The next prime is 721109. The reversal of 721094 is 490127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 721094.

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 in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (74925).

2⁷²¹⁰⁹⁴ is an apocalyptic number.

721094 is a deficient number, since it is larger than the sum of its proper divisors (477706).

721094 is a wasteful number, since it uses less digits than its factorization.

721094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 721094 is about 849.1725384161. The cubic root of 721094 is about 89.6734669291.

The spelling of 721094 in words is "seven hundred twenty-one thousand, ninety-four".