721074 has 16 divisors (see below), whose sum is σ = 1473408. Its totient is φ = 235152.

The previous prime is 721057. The next prime is 721079. The reversal of 721074 is 470127.

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

It is a self number, because there is not a number n which added to its sum of digits gives 721074.

It is not an unprimeable number, because it can be changed into a prime (721079) by changing a digit.

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, 997 + ... + 1560.

It is an arithmetic number, because the mean of its divisors is an integer number (92088).

2⁷²¹⁰⁷⁴ is an apocalyptic number.

721074 is an abundant number, since it is smaller than the sum of its proper divisors (752334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721074 is a wasteful number, since it uses less digits than its factorization.

721074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 721074 is about 849.1607621646. The cubic root of 721074 is about 89.6726378713.

The spelling of 721074 in words is "seven hundred twenty-one thousand, seventy-four", and thus it is an iban number.