261127411 has 4 divisors (see below), whose sum is σ = 262636992. Its totient is φ = 259617832.

The previous prime is 261127381. The next prime is 261127423. The reversal of 261127411 is 114721162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261127411 - 2⁷ = 261127283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261127511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754531 + ... + 754876.

It is an arithmetic number, because the mean of its divisors is an integer number (65659248).

Almost surely, 2^261127411 is an apocalyptic number.

261127411 is a deficient number, since it is larger than the sum of its proper divisors (1509581).

261127411 is a wasteful number, since it uses less digits than its factorization.

261127411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509580.

The product of its digits is 672, while the sum is 25.

The square root of 261127411 is about 16159.4372117348. The cubic root of 261127411 is about 639.1716260236.

Adding to 261127411 its reverse (114721162), we get a palindrome (375848573).

The spelling of 261127411 in words is "two hundred sixty-one million, one hundred twenty-seven thousand, four hundred eleven".