261395 has 8 divisors (see below), whose sum is σ = 327456. Its totient is φ = 199936.

The previous prime is 261389. The next prime is 261407. The reversal of 261395 is 593162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261395 - 2⁴ = 261379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (40932).

2²⁶¹³⁹⁵ is an apocalyptic number.

261395 is a deficient number, since it is larger than the sum of its proper divisors (66061).

261395 is a wasteful number, since it uses less digits than its factorization.

261395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its digits is 1620, while the sum is 26.

The square root of 261395 is about 511.2680314669. The cubic root of 261395 is about 63.9389880791.

It can be divided in two parts, 261 and 395, that added together give a palindrome (656).

The spelling of 261395 in words is "two hundred sixty-one thousand, three hundred ninety-five".