261341061 has 8 divisors (see below), whose sum is σ = 348700704. Its totient is φ = 174104400.

The previous prime is 261341053. The next prime is 261341081. The reversal of 261341061 is 160143162.

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

It is not a de Polignac number, because 261341061 - 2³ = 261341053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261341081) 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, 25666 + ... + 34371.

It is an arithmetic number, because the mean of its divisors is an integer number (43587588).

Almost surely, 2^261341061 is an apocalyptic number.

It is an amenable number.

261341061 is a deficient number, since it is larger than the sum of its proper divisors (87359643).

261341061 is a wasteful number, since it uses less digits than its factorization.

261341061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61491.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 261341061 is about 16166.0465482443. The cubic root of 261341061 is about 639.3458982826.

The spelling of 261341061 in words is "two hundred sixty-one million, three hundred forty-one thousand, sixty-one".