161105701 has 4 divisors (see below), whose sum is σ = 166661100. Its totient is φ = 155550304.

The previous prime is 161105689. The next prime is 161105713. The reversal of 161105701 is 107501161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 107501161 = 43 ⋅2500027.

It is an interprime number because it is at equal distance from previous prime (161105689) and next prime (161105713).

It can be written as a sum of positive squares in 2 ways, for example, as 26522500 + 134583201 = 5150^2 + 11601^2 .

It is a cyclic number.

It is not a de Polignac number, because 161105701 - 2²⁵ = 127551269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161105741) 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, 2777656 + ... + 2777713.

It is an arithmetic number, because the mean of its divisors is an integer number (41665275).

Almost surely, 2^161105701 is an apocalyptic number.

It is an amenable number.

161105701 is a deficient number, since it is larger than the sum of its proper divisors (5555399).

161105701 is an equidigital number, since it uses as much as digits as its factorization.

161105701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555398.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 161105701 is about 12692.7420599333. The cubic root of 161105701 is about 544.1312095648.

Adding to 161105701 its reverse (107501161), we get a palindrome (268606862).

The spelling of 161105701 in words is "one hundred sixty-one million, one hundred five thousand, seven hundred one".