261105455 has 8 divisors (see below), whose sum is σ = 337428672. Its totient is φ = 192816288.

The previous prime is 261105419. The next prime is 261105457. The reversal of 261105455 is 554501162.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261105455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261105457) 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, 2008439 + ... + 2008568.

It is an arithmetic number, because the mean of its divisors is an integer number (42178584).

Almost surely, 2^261105455 is an apocalyptic number.

261105455 is a deficient number, since it is larger than the sum of its proper divisors (76323217).

261105455 is a wasteful number, since it uses less digits than its factorization.

261105455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017025.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 261105455 is about 16158.7578421115. The cubic root of 261105455 is about 639.1537113391.

The spelling of 261105455 in words is "two hundred sixty-one million, one hundred five thousand, four hundred fifty-five".