261219795 has 32 divisors (see below), whose sum is σ = 433465344. Its totient is φ = 134188800.

The previous prime is 261219779. The next prime is 261219799. The reversal of 261219795 is 597912162.

It is not a de Polignac number, because 261219795 - 2⁴ = 261219779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261219799) 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 31 ways as a sum of consecutive naturals, for example, 107140 + ... + 109550.

It is an arithmetic number, because the mean of its divisors is an integer number (13545792).

Almost surely, 2^261219795 is an apocalyptic number.

261219795 is a deficient number, since it is larger than the sum of its proper divisors (172245549).

261219795 is a wasteful number, since it uses less digits than its factorization.

261219795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683.

The product of its digits is 68040, while the sum is 42.

The square root of 261219795 is about 16162.2954743440. The cubic root of 261219795 is about 639.2469944284.

The spelling of 261219795 in words is "two hundred sixty-one million, two hundred nineteen thousand, seven hundred ninety-five".