725045 has 4 divisors (see below), whose sum is σ = 870060. Its totient is φ = 580032.

The previous prime is 725041. The next prime is 725057. The reversal of 725045 is 540527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540527 = 13 ⋅41579.

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 579121 = 382^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 725045 - 2² = 725041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 725045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72500 + ... + 72509.

It is an arithmetic number, because the mean of its divisors is an integer number (217515).

2⁷²⁵⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

725045 is a deficient number, since it is larger than the sum of its proper divisors (145015).

725045 is a wasteful number, since it uses less digits than its factorization.

725045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145014.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 725045 is about 851.4957427962. The cubic root of 725045 is about 89.8369475757.

It can be divided in two parts, 7 and 25045, that added together give a palindrome (25052).

The spelling of 725045 in words is "seven hundred twenty-five thousand, forty-five".