721027 has 12 divisors (see below), whose sum is σ = 796320. Its totient is φ = 651728.

The previous prime is 721013. The next prime is 721037. The reversal of 721027 is 720127.

It is not a de Polignac number, because 721027 - 2⁷ = 720899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720995 and 721013.

It is not an unprimeable number, because it can be changed into a prime (721037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15318 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (66360).

2⁷²¹⁰²⁷ is an apocalyptic number.

721027 is a deficient number, since it is larger than the sum of its proper divisors (75293).

721027 is a wasteful number, since it uses less digits than its factorization.

721027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 721027 is about 849.1330873308. The cubic root of 721027 is about 89.6706895250.

Subtracting from 721027 its reverse (720127), we obtain a square (900 = 30²).

The spelling of 721027 in words is "seven hundred twenty-one thousand, twenty-seven", and thus it is an iban number.