261212 has 24 divisors (see below), whose sum is σ = 551040. Its totient is φ = 105840.

The previous prime is 261169. The next prime is 261223. The reversal of 261212 is 212162.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

261212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287 + ... + 777.

It is an arithmetic number, because the mean of its divisors is an integer number (22960).

2²⁶¹²¹² 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 261212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275520).

261212 is an abundant number, since it is smaller than the sum of its proper divisors (289828).

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

261212 is a wasteful number, since it uses less digits than its factorization.

261212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 519 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 261212 is about 511.0890333396. The cubic root of 261212 is about 63.9240635824.

Adding to 261212 its reverse (212162), we get a palindrome (473374).

The spelling of 261212 in words is "two hundred sixty-one thousand, two hundred twelve".