722487 has 4 divisors (see below), whose sum is σ = 963320. Its totient is φ = 481656.

The previous prime is 722479. The next prime is 722489. The reversal of 722487 is 784227.

722487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 722487 - 2³ = 722479 is a prime.

It is a D-number.

It is a Duffinian number.

722487 is a lucky number.

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 722487.

It is not an unprimeable number, because it can be changed into a prime (722489) 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, 120412 + ... + 120417.

It is an arithmetic number, because the mean of its divisors is an integer number (240830).

2⁷²²⁴⁸⁷ is an apocalyptic number.

722487 is a deficient number, since it is larger than the sum of its proper divisors (240833).

722487 is a wasteful number, since it uses less digits than its factorization.

722487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240832.

The product of its digits is 6272, while the sum is 30.

The square root of 722487 is about 849.9923529068. The cubic root of 722487 is about 89.7311731316.

The spelling of 722487 in words is "seven hundred twenty-two thousand, four hundred eighty-seven".