725225261 has 8 divisors (see below), whose sum is σ = 743267448. Its totient is φ = 707200000.

The previous prime is 725225257. The next prime is 725225273. The reversal of 725225261 is 162522527.

It can be written as a sum of positive squares in 4 ways, for example, as 361 + 725224900 = 19^2 + 26930^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 725225261 - 2² = 725225257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725225251) 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, 161831 + ... + 166251.

It is an arithmetic number, because the mean of its divisors is an integer number (92908431).

Almost surely, 2^725225261 is an apocalyptic number.

It is an amenable number.

725225261 is a deficient number, since it is larger than the sum of its proper divisors (18042187).

725225261 is a wasteful number, since it uses less digits than its factorization.

725225261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463.

The product of its digits is 16800, while the sum is 32.

The square root of 725225261 is about 26930.0067025614. The cubic root of 725225261 is about 898.4439205899.

Adding to 725225261 its reverse (162522527), we get a palindrome (887747788).

It can be divided in two parts, 72522526 and 1, that added together give a palindrome (72522527).

The spelling of 725225261 in words is "seven hundred twenty-five million, two hundred twenty-five thousand, two hundred sixty-one".