261504032 has 24 divisors (see below), whose sum is σ = 517822956. Its totient is φ = 129993472.

The previous prime is 261504029. The next prime is 261504037. The reversal of 261504032 is 230405162.

It can be written as a sum of positive squares in 2 ways, for example, as 258695056 + 2808976 = 16084^2 + 1676^2 .

It is a junction number, because it is equal to n+sod(n) for n = 261503989 and 261504007.

It is not an unprimeable number, because it can be changed into a prime (261504037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18083 + ... + 29154.

Almost surely, 2^261504032 is an apocalyptic number.

It is an amenable number.

261504032 is a deficient number, since it is larger than the sum of its proper divisors (256318924).

261504032 is a wasteful number, since it uses less digits than its factorization.

261504032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47420 (or 47412 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 261504032 is about 16171.0862962264. The cubic root of 261504032 is about 639.4787683197.

Adding to 261504032 its reverse (230405162), we get a palindrome (491909194).

The spelling of 261504032 in words is "two hundred sixty-one million, five hundred four thousand, thirty-two".