161267101 has 4 divisors (see below), whose sum is σ = 161350812. Its totient is φ = 161183392.

The previous prime is 161267069. The next prime is 161267107. The reversal of 161267101 is 101762161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101762161 = 1223 ⋅83207.

It can be written as a sum of positive squares in 2 ways, for example, as 34164025 + 127103076 = 5845^2 + 11274^2 .

It is a cyclic number.

It is not a de Polignac number, because 161267101 - 2⁵ = 161267069 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 (161267107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38896 + ... + 42841.

It is an arithmetic number, because the mean of its divisors is an integer number (40337703).

Almost surely, 2^161267101 is an apocalyptic number.

It is an amenable number.

161267101 is a deficient number, since it is larger than the sum of its proper divisors (83711).

161267101 is an equidigital number, since it uses as much as digits as its factorization.

161267101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83710.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 161267101 is about 12699.0984325660. The cubic root of 161267101 is about 544.3128573179.

The spelling of 161267101 in words is "one hundred sixty-one million, two hundred sixty-seven thousand, one hundred one".