261204122 has 16 divisors (see below), whose sum is σ = 396876480. Its totient is φ = 128919168.

The previous prime is 261204107. The next prime is 261204149. The reversal of 261204122 is 221402162.

It is a happy number.

261204122 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261204094 and 261204103.

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, 83633 + ... + 86699.

It is an arithmetic number, because the mean of its divisors is an integer number (24804780).

Almost surely, 2^261204122 is an apocalyptic number.

261204122 is a deficient number, since it is larger than the sum of its proper divisors (135672358).

261204122 is a wasteful number, since it uses less digits than its factorization.

261204122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 261204122 is about 16161.8106040134. The cubic root of 261204122 is about 639.2342093859.

Adding to 261204122 its reverse (221402162), we get a palindrome (482606284).

The spelling of 261204122 in words is "two hundred sixty-one million, two hundred four thousand, one hundred twenty-two".