261532 has 12 divisors (see below), whose sum is σ = 461776. Its totient is φ = 129600.

The previous prime is 261529. The next prime is 261557. The reversal of 261532 is 235162.

It is a happy number.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388 + ... + 820.

2²⁶¹⁵³² is an apocalyptic number.

It is an amenable number.

261532 is a deficient number, since it is larger than the sum of its proper divisors (200244).

261532 is a wasteful number, since it uses less digits than its factorization.

261532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 586 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 261532 is about 511.4019945209. The cubic root of 261532 is about 63.9501565042.

Adding to 261532 its reverse (235162), we get a palindrome (496694).

The spelling of 261532 in words is "two hundred sixty-one thousand, five hundred thirty-two".