725719 has 8 divisors (see below), whose sum is σ = 766080. Its totient is φ = 686136.

The previous prime is 725687. The next prime is 725723. The reversal of 725719 is 917527.

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

It is not a de Polignac number, because 725719 - 2⁵ = 725687 is a prime.

It is a super-2 number, since 2×725719² = 1053336133922, which contains 22 as substring.

It is a Duffinian number.

725719 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3084 + ... + 3310.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2⁷²⁵⁷¹⁹ is an apocalyptic number.

725719 is a deficient number, since it is larger than the sum of its proper divisors (40361).

725719 is a wasteful number, since it uses less digits than its factorization.

725719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its digits is 4410, while the sum is 31.

The square root of 725719 is about 851.8914250067. The cubic root of 725719 is about 89.8647763541.

It can be divided in two parts, 725 and 719, that added together give a square (1444 = 38²).

The spelling of 725719 in words is "seven hundred twenty-five thousand, seven hundred nineteen".