725340 has 96 divisors (see below), whose sum is σ = 2548224. Its totient is φ = 149760.

The previous prime is 725327. The next prime is 725341. The reversal of 725340 is 43527.

It is a happy number.

It is a super-2 number, since 2×725340² = 1052236231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4542 + ... + 4698.

It is an arithmetic number, because the mean of its divisors is an integer number (26544).

2⁷²⁵³⁴⁰ is an apocalyptic number.

725340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274112).

725340 is an abundant number, since it is smaller than the sum of its proper divisors (1822884).

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

725340 is a wasteful number, since it uses less digits than its factorization.

725340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 725340 is about 851.6689497686. The cubic root of 725340 is about 89.8491299488.

Adding to 725340 its reverse (43527), we get a palindrome (768867).

The spelling of 725340 in words is "seven hundred twenty-five thousand, three hundred forty".