261601107 has 8 divisors (see below), whose sum is σ = 356222976. Its totient is φ = 170689992.

The previous prime is 261601097. The next prime is 261601129. The reversal of 261601107 is 701106162.

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

It is not a de Polignac number, because 261601107 - 2¹⁰ = 261600083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261603107) 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, 927523 + ... + 927804.

It is an arithmetic number, because the mean of its divisors is an integer number (44527872).

Almost surely, 2^261601107 is an apocalyptic number.

261601107 is a deficient number, since it is larger than the sum of its proper divisors (94621869).

261601107 is a wasteful number, since it uses less digits than its factorization.

261601107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855377.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 261601107 is about 16174.0875167658. The cubic root of 261601107 is about 639.5578872038.

Adding to 261601107 its reverse (701106162), we get a palindrome (962707269).

The spelling of 261601107 in words is "two hundred sixty-one million, six hundred one thousand, one hundred seven".