165406101 has 16 divisors (see below), whose sum is σ = 255502464. Its totient is φ = 93222144.

The previous prime is 165406099. The next prime is 165406103. The reversal of 165406101 is 101604561.

It is an interprime number because it is at equal distance from previous prime (165406099) and next prime (165406103).

It is not a de Polignac number, because 165406101 - 2¹ = 165406099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165406103) 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 15 ways as a sum of consecutive naturals, for example, 52416 + ... + 55481.

It is an arithmetic number, because the mean of its divisors is an integer number (15968904).

Almost surely, 2^165406101 is an apocalyptic number.

It is an amenable number.

165406101 is a deficient number, since it is larger than the sum of its proper divisors (90096363).

165406101 is a wasteful number, since it uses less digits than its factorization.

165406101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107980.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 165406101 is about 12861.0303242003. The cubic root of 165406101 is about 548.9302634372.

The spelling of 165406101 in words is "one hundred sixty-five million, four hundred six thousand, one hundred one".