261016 has 32 divisors (see below), whose sum is σ = 576000. Its totient is φ = 108576.

The previous prime is 261013. The next prime is 261017. The reversal of 261016 is 610162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261011) 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, 3265 + ... + 3343.

It is an arithmetic number, because the mean of its divisors is an integer number (18000).

2²⁶¹⁰¹⁶ 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 261016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288000).

261016 is an abundant number, since it is smaller than the sum of its proper divisors (314984).

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

261016 is a wasteful number, since it uses less digits than its factorization.

261016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 261016 is about 510.8972499437. The cubic root of 261016 is about 63.9080711427.

Adding to 261016 its reverse (610162), we get a palindrome (871178).

The spelling of 261016 in words is "two hundred sixty-one thousand, sixteen".