261562 has 24 divisors (see below), whose sum is σ = 486324. Its totient is φ = 104832.

The previous prime is 261557. The next prime is 261563. The reversal of 261562 is 265162.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 441 = 511^2 + 21^2 .

It is not an unprimeable number, because it can be changed into a prime (261563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1588 + ... + 1744.

2²⁶¹⁵⁶² is an apocalyptic number.

261562 is a deficient number, since it is larger than the sum of its proper divisors (224762).

261562 is a wasteful number, since it uses less digits than its factorization.

261562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 183 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 261562 is about 511.4313248130. The cubic root of 261562 is about 63.9526016242.

Subtracting 261562 from its reverse (265162), we obtain a square (3600 = 60²).

The spelling of 261562 in words is "two hundred sixty-one thousand, five hundred sixty-two".