261028411 has 8 divisors (see below), whose sum is σ = 298429664. Its totient is φ = 223655040.

The previous prime is 261028399. The next prime is 261028477. The reversal of 261028411 is 114820162.

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

It is not a de Polignac number, because 261028411 - 2⁷ = 261028283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261020411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20131 + ... + 30451.

It is an arithmetic number, because the mean of its divisors is an integer number (37303708).

Almost surely, 2^261028411 is an apocalyptic number.

261028411 is a deficient number, since it is larger than the sum of its proper divisors (37401253).

261028411 is a wasteful number, since it uses less digits than its factorization.

261028411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13941.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 261028411 is about 16156.3736958514. The cubic root of 261028411 is about 639.0908404419.

Adding to 261028411 its reverse (114820162), we get a palindrome (375848573).

The spelling of 261028411 in words is "two hundred sixty-one million, twenty-eight thousand, four hundred eleven".