261063 has 20 divisors (see below), whose sum is σ = 426888. Its totient is φ = 157680.

The previous prime is 261061. The next prime is 261071. The reversal of 261063 is 360162.

It is a happy number.

It is not a de Polignac number, because 261063 - 2¹ = 261061 is a prime.

261063 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 745 + ... + 1037.

2²⁶¹⁰⁶³ is an apocalyptic number.

261063 is a deficient number, since it is larger than the sum of its proper divisors (165825).

261063 is a wasteful number, since it uses less digits than its factorization.

261063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 261063 is about 510.9432453805. The cubic root of 261063 is about 63.9119067940.

Subtracting 261063 from its reverse (360162), we obtain a palindrome (99099).

It can be divided in two parts, 26 and 1063, that added together give a square (1089 = 33²).

The spelling of 261063 in words is "two hundred sixty-one thousand, sixty-three".