721950 has 24 divisors (see below), whose sum is σ = 1790808. Its totient is φ = 192480.

The previous prime is 721921. The next prime is 721951. The reversal of 721950 is 59127.

It is a self number, because there is not a number n which added to its sum of digits gives 721950.

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 721950.

It is not an unprimeable number, because it can be changed into a prime (721951) by changing a digit.

721950 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2257 + ... + 2556.

It is an arithmetic number, because the mean of its divisors is an integer number (74617).

2⁷²¹⁹⁵⁰ is an apocalyptic number.

721950 is an abundant number, since it is smaller than the sum of its proper divisors (1068858).

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

721950 is a wasteful number, since it uses less digits than its factorization.

721950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 721950 is about 849.6764089934. The cubic root of 721950 is about 89.7089362456.

The spelling of 721950 in words is "seven hundred twenty-one thousand, nine hundred fifty".