725445 has 48 divisors (see below), whose sum is σ = 1497600. Its totient is φ = 324576.

The previous prime is 725437. The next prime is 725447. The reversal of 725445 is 544527.

It is not a de Polignac number, because 725445 - 2³ = 725437 is a prime.

725445 is a lucky number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15412 + ... + 15458.

It is an arithmetic number, because the mean of its divisors is an integer number (31200).

2⁷²⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

725445 is an abundant number, since it is smaller than the sum of its proper divisors (772155).

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

725445 is a wasteful number, since it uses less digits than its factorization.

725445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 62 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 725445 is about 851.7305912083. The cubic root of 725445 is about 89.8534652506.

It can be divided in two parts, 7 and 25445, that added together give a palindrome (25452).

The spelling of 725445 in words is "seven hundred twenty-five thousand, four hundred forty-five".