261204106 has 8 divisors (see below), whose sum is σ = 392214240. Its totient is φ = 130466028.

The previous prime is 261204103. The next prime is 261204107. The reversal of 261204106 is 601402162.

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

It is not an unprimeable number, because it can be changed into a prime (261204103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65596 + ... + 69463.

It is an arithmetic number, because the mean of its divisors is an integer number (49026780).

Almost surely, 2^261204106 is an apocalyptic number.

261204106 is a deficient number, since it is larger than the sum of its proper divisors (131010134).

261204106 is a wasteful number, since it uses less digits than its factorization.

261204106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136028.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 261204106 is about 16161.8101090193. The cubic root of 261204106 is about 639.2341963338.

Adding to 261204106 its reverse (601402162), we get a palindrome (862606268).

The spelling of 261204106 in words is "two hundred sixty-one million, two hundred four thousand, one hundred six".