161207105 has 8 divisors (see below), whose sum is σ = 194202792. Its totient is φ = 128462848.

The previous prime is 161207093. The next prime is 161207119. The reversal of 161207105 is 501702161.

161207105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 48762289 + 112444816 = 6983^2 + 10604^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 161207105 - 2¹⁶ = 161141569 is a prime.

It is a Duffinian 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, 61442 + ... + 64011.

It is an arithmetic number, because the mean of its divisors is an integer number (24275349).

Almost surely, 2^161207105 is an apocalyptic number.

It is an amenable number.

161207105 is a deficient number, since it is larger than the sum of its proper divisors (32995687).

161207105 is a wasteful number, since it uses less digits than its factorization.

161207105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125715.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 161207105 is about 12696.7359978854. The cubic root of 161207105 is about 544.2453489326.

Adding to 161207105 its reverse (501702161), we get a palindrome (662909266).

The spelling of 161207105 in words is "one hundred sixty-one million, two hundred seven thousand, one hundred five".