261080239 has 8 divisors (see below), whose sum is σ = 299878400. Its totient is φ = 222657336.

The previous prime is 261080207. The next prime is 261080257. The reversal of 261080239 is 932080162.

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 261080239 - 2⁵ = 261080207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261080239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261080299) 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, 92319 + ... + 95104.

It is an arithmetic number, because the mean of its divisors is an integer number (37484800).

Almost surely, 2^261080239 is an apocalyptic number.

261080239 is a deficient number, since it is larger than the sum of its proper divisors (38798161).

261080239 is a wasteful number, since it uses less digits than its factorization.

261080239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187629.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 261080239 is about 16157.9775652772. The cubic root of 261080239 is about 639.1331354651.

The spelling of 261080239 in words is "two hundred sixty-one million, eighty thousand, two hundred thirty-nine".