261069 has 8 divisors (see below), whose sum is σ = 368640. Its totient is φ = 163776.

The previous prime is 261061. The next prime is 261071. The reversal of 261069 is 960162.

261069 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 261069 - 2³ = 261061 is a prime.

It is a super-2 number, since 2×261069² = 136314045522, which contains 22 as substring.

261069 is strictly pandigital in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261069.

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 7 ways as a sum of consecutive naturals, for example, 2509 + ... + 2610.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2²⁶¹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

261069 is a deficient number, since it is larger than the sum of its proper divisors (107571).

261069 is a wasteful number, since it uses less digits than its factorization.

261069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 261069 is about 510.9491168404. The cubic root of 261069 is about 63.9123964184.

The spelling of 261069 in words is "two hundred sixty-one thousand, sixty-nine".