165462121 has 4 divisors (see below), whose sum is σ = 180504144. Its totient is φ = 150420100.

The previous prime is 165462119. The next prime is 165462149. The reversal of 165462121 is 121264561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121264561 = 11 ⋅11024051.

It is a cyclic number.

It is not a de Polignac number, because 165462121 - 2¹ = 165462119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165462121.

It is not an unprimeable number, because it can be changed into a prime (165462421) 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, 7520995 + ... + 7521016.

It is an arithmetic number, because the mean of its divisors is an integer number (45126036).

Almost surely, 2^165462121 is an apocalyptic number.

165462121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165462121 is a deficient number, since it is larger than the sum of its proper divisors (15042023).

165462121 is a wasteful number, since it uses less digits than its factorization.

165462121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15042022.

The product of its digits is 2880, while the sum is 28.

The square root of 165462121 is about 12863.2080368779. The cubic root of 165462121 is about 548.9922272991.

The spelling of 165462121 in words is "one hundred sixty-five million, four hundred sixty-two thousand, one hundred twenty-one".