261594 has 12 divisors (see below), whose sum is σ = 566826. Its totient is φ = 87192.

The previous prime is 261593. The next prime is 261601. The reversal of 261594 is 495162.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 45369 = 465^2 + 213^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (261593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7249 + ... + 7284.

2²⁶¹⁵⁹⁴ is an apocalyptic number.

261594 is an abundant number, since it is smaller than the sum of its proper divisors (305232).

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

261594 is a wasteful number, since it uses less digits than its factorization.

261594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14541 (or 14538 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261594 is about 511.4626086040. The cubic root of 261594 is about 63.9552095461.

The spelling of 261594 in words is "two hundred sixty-one thousand, five hundred ninety-four".