261504112 has 20 divisors (see below), whose sum is σ = 528693840. Its totient is φ = 125067008.

The previous prime is 261504097. The next prime is 261504119. The reversal of 261504112 is 211405162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261504119) 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, 354937 + ... + 355672.

It is an arithmetic number, because the mean of its divisors is an integer number (26434692).

Almost surely, 2^261504112 is an apocalyptic number.

It is an amenable number.

261504112 is an abundant number, since it is smaller than the sum of its proper divisors (267189728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261504112 is a wasteful number, since it uses less digits than its factorization.

261504112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710640 (or 710634 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 261504112 is about 16171.0887697768. The cubic root of 261504112 is about 639.4788335301.

Adding to 261504112 its reverse (211405162), we get a palindrome (472909274).

The spelling of 261504112 in words is "two hundred sixty-one million, five hundred four thousand, one hundred twelve".