725140 has 24 divisors (see below), whose sum is σ = 1640520. Its totient is φ = 267648.

The previous prime is 725119. The next prime is 725147. The reversal of 725140 is 41527.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 698896 = 162^2 + 836^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (68355).

2⁷²⁵¹⁴⁰ is an apocalyptic number.

It is an amenable number.

725140 is an abundant number, since it is smaller than the sum of its proper divisors (915380).

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

725140 is a wasteful number, since it uses less digits than its factorization.

725140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2809 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 725140 is about 851.5515251586. The cubic root of 725140 is about 89.8408710735.

Adding to 725140 its reverse (41527), we get a palindrome (766667).

The spelling of 725140 in words is "seven hundred twenty-five thousand, one hundred forty".