721042 has 8 divisors (see below), whose sum is σ = 1236096. Its totient is φ = 309012.

The previous prime is 721037. The next prime is 721043. The reversal of 721042 is 240127.

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

It is not an unprimeable number, because it can be changed into a prime (721043) 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, 25738 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (154512).

2⁷²¹⁰⁴² is an apocalyptic number.

721042 is a deficient number, since it is larger than the sum of its proper divisors (515054).

721042 is a wasteful number, since it uses less digits than its factorization.

721042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51512.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 721042 is about 849.1419198226. The cubic root of 721042 is about 89.6713113468.

Adding to 721042 its reverse (240127), we get a palindrome (961169).

The spelling of 721042 in words is "seven hundred twenty-one thousand, forty-two", and thus it is an iban number.