725261 has 8 divisors (see below), whose sum is σ = 761400. Its totient is φ = 689920.

The previous prime is 725209. The next prime is 725273. The reversal of 725261 is 162527.

It can be written as a sum of positive squares in 4 ways, for example, as 75625 + 649636 = 275^2 + 806^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725261 is a prime.

It is a Duffinian number.

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 (725201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441 + ... + 2721.

It is an arithmetic number, because the mean of its divisors is an integer number (95175).

2⁷²⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

725261 is a deficient number, since it is larger than the sum of its proper divisors (36139).

725261 is a wasteful number, since it uses less digits than its factorization.

725261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 840, while the sum is 23.

The square root of 725261 is about 851.6225689823. The cubic root of 725261 is about 89.8458678745.

Adding to 725261 its reverse (162527), we get a palindrome (887788).

It can be divided in two parts, 72526 and 1, that added together give a palindrome (72527).

The spelling of 725261 in words is "seven hundred twenty-five thousand, two hundred sixty-one".