725601 has 4 divisors (see below), whose sum is σ = 967472. Its totient is φ = 483732.

The previous prime is 725597. The next prime is 725603. The reversal of 725601 is 106527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106527 = 3 ⋅35509.

It is not a de Polignac number, because 725601 - 2² = 725597 is a prime.

It is a super-2 number, since 2×725601² = 1052993622402, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725601.

It is not an unprimeable number, because it can be changed into a prime (725603) 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, 120931 + ... + 120936.

It is an arithmetic number, because the mean of its divisors is an integer number (241868).

2⁷²⁵⁶⁰¹ is an apocalyptic number.

It is an amenable number.

725601 is a deficient number, since it is larger than the sum of its proper divisors (241871).

725601 is a wasteful number, since it uses less digits than its factorization.

725601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241870.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 725601 is about 851.8221645391. The cubic root of 725601 is about 89.8599054981.

It can be divided in two parts, 725 and 601, that added together give a triangular number (1326 = T₅₁).

The spelling of 725601 in words is "seven hundred twenty-five thousand, six hundred one".