725331261 has 4 divisors (see below), whose sum is σ = 967108352. Its totient is φ = 483554172.

The previous prime is 725331241. The next prime is 725331263. The reversal of 725331261 is 162133527.

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.

It is not a de Polignac number, because 725331261 - 2²⁷ = 591113533 is a prime.

It is a super-2 number, since 2×725331261² = 1052210876367700242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725331263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120888541 + ... + 120888546.

It is an arithmetic number, because the mean of its divisors is an integer number (241777088).

Almost surely, 2^725331261 is an apocalyptic number.

It is an amenable number.

725331261 is a deficient number, since it is larger than the sum of its proper divisors (241777091).

725331261 is a wasteful number, since it uses less digits than its factorization.

725331261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241777090.

The product of its digits is 7560, while the sum is 30.

The square root of 725331261 is about 26931.9746955176. The cubic root of 725331261 is about 898.4876910895.

Adding to 725331261 its reverse (162133527), we get a palindrome (887464788).

The spelling of 725331261 in words is "seven hundred twenty-five million, three hundred thirty-one thousand, two hundred sixty-one".