261012 has 12 divisors (see below), whose sum is σ = 609056. Its totient is φ = 87000.

The previous prime is 261011. The next prime is 261013. The reversal of 261012 is 210162.

It is an interprime number because it is at equal distance from previous prime (261011) and next prime (261013).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 21751 = 261012 / (2 + 6 + 1 + 0 + 1 + 2).

It is an Ulam number.

It is a nialpdrome in base 6.

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 3 ways as a sum of consecutive naturals, for example, 10864 + ... + 10887.

2²⁶¹⁰¹² is an apocalyptic number.

It is an amenable number.

261012 is an abundant number, since it is smaller than the sum of its proper divisors (348044).

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

261012 is a wasteful number, since it uses less digits than its factorization.

261012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21758 (or 21756 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 261012 is about 510.8933352472. The cubic root of 261012 is about 63.9077446830.

Adding to 261012 its reverse (210162), we get a palindrome (471174).

The spelling of 261012 in words is "two hundred sixty-one thousand, twelve".