261037112 has 48 divisors (see below), whose sum is σ = 587747520. Its totient is φ = 108259200.

The previous prime is 261037111. The next prime is 261037121. The reversal of 261037112 is 211730162.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261037111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1412 + ... + 22892.

It is an arithmetic number, because the mean of its divisors is an integer number (12244740).

Almost surely, 2^261037112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261037112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293873760).

261037112 is an abundant number, since it is smaller than the sum of its proper divisors (326710408).

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

261037112 is a wasteful number, since it uses less digits than its factorization.

261037112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21532 (or 21521 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 261037112 is about 16156.6429681416. The cubic root of 261037112 is about 639.0979414155.

Adding to 261037112 its reverse (211730162), we get a palindrome (472767274).

The spelling of 261037112 in words is "two hundred sixty-one million, thirty-seven thousand, one hundred twelve".