261486 has 24 divisors (see below), whose sum is σ = 577200. Its totient is φ = 85536.

The previous prime is 261467. The next prime is 261509. The reversal of 261486 is 684162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1215 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (24050).

2²⁶¹⁴⁸⁶ is an apocalyptic number.

261486 is an abundant number, since it is smaller than the sum of its proper divisors (315714).

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

261486 is a wasteful number, since it uses less digits than its factorization.

261486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 277 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 261486 is about 511.3570181390. The cubic root of 261486 is about 63.9464069571.

It can be divided in two parts, 261 and 486, that added together give a palindrome (747).

The spelling of 261486 in words is "two hundred sixty-one thousand, four hundred eighty-six".