725240 has 16 divisors (see below), whose sum is σ = 1631880. Its totient is φ = 290080.

The previous prime is 725209. The next prime is 725273. The reversal of 725240 is 42527.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9026 + ... + 9105.

2⁷²⁵²⁴⁰ is an apocalyptic number.

It is an amenable number.

725240 is an abundant number, since it is smaller than the sum of its proper divisors (906640).

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

725240 is a wasteful number, since it uses less digits than its factorization.

725240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142 (or 18138 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 725240 is about 851.6102394875. The cubic root of 725240 is about 89.8450007009.

Adding to 725240 its reverse (42527), we get a palindrome (767767).

The spelling of 725240 in words is "seven hundred twenty-five thousand, two hundred forty".