261093 has 8 divisors (see below), whose sum is σ = 397888. Its totient is φ = 149184.

The previous prime is 261089. The next prime is 261101. The reversal of 261093 is 390162.

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

It is not a de Polignac number, because 261093 - 2² = 261089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 12433 = 261093 / (2 + 6 + 1 + 0 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6196 + ... + 6237.

It is an arithmetic number, because the mean of its divisors is an integer number (49736).

2²⁶¹⁰⁹³ is an apocalyptic number.

It is an amenable number.

261093 is a deficient number, since it is larger than the sum of its proper divisors (136795).

261093 is a wasteful number, since it uses less digits than its factorization.

261093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12443.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 261093 is about 510.9726020052. The cubic root of 261093 is about 63.9143548413.

The spelling of 261093 in words is "two hundred sixty-one thousand, ninety-three".