165051241 has 4 divisors (see below), whose sum is σ = 166238800. Its totient is φ = 163863684.

The previous prime is 165051193. The next prime is 165051247. The reversal of 165051241 is 142150561.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 165051241 - 2¹³ = 165043049 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (165051247) 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, 593571 + ... + 593848.

It is an arithmetic number, because the mean of its divisors is an integer number (41559700).

Almost surely, 2^165051241 is an apocalyptic number.

It is an amenable number.

165051241 is a deficient number, since it is larger than the sum of its proper divisors (1187559).

165051241 is a wasteful number, since it uses less digits than its factorization.

165051241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187558.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 165051241 is about 12847.2269770562. The cubic root of 165051241 is about 548.5374265330.

The spelling of 165051241 in words is "one hundred sixty-five million, fifty-one thousand, two hundred forty-one".