261014405 has 8 divisors (see below), whose sum is σ = 320856984. Its totient is φ = 203718400.

The previous prime is 261014387. The next prime is 261014417. The reversal of 261014405 is 504410162.

It can be written as a sum of positive squares in 4 ways, for example, as 450241 + 260564164 = 671^2 + 16142^2 .

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

It is not a de Polignac number, because 261014405 - 2¹⁰ = 261013381 is a prime.

It is a super-5 number, since 5×261014405⁵ (a number of 43 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636416 + ... + 636825.

It is an arithmetic number, because the mean of its divisors is an integer number (40107123).

Almost surely, 2^261014405 is an apocalyptic number.

It is an amenable number.

261014405 is a deficient number, since it is larger than the sum of its proper divisors (59842579).

261014405 is a wasteful number, since it uses less digits than its factorization.

261014405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273287.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 261014405 is about 16155.9402388100. The cubic root of 261014405 is about 639.0794096729.

Adding to 261014405 its reverse (504410162), we get a palindrome (765424567).

The spelling of 261014405 in words is "two hundred sixty-one million, fourteen thousand, four hundred five".