165011249 has 4 divisors (see below), whose sum is σ = 177704436. Its totient is φ = 152318064.

The previous prime is 165011243. The next prime is 165011263. The reversal of 165011249 is 942110561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942110561 = 7 ⋅134587223.

It can be written as a sum of positive squares in 2 ways, for example, as 111091600 + 53919649 = 10540^2 + 7343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165011249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165011243) 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, 6346574 + ... + 6346599.

It is an arithmetic number, because the mean of its divisors is an integer number (44426109).

Almost surely, 2^165011249 is an apocalyptic number.

It is an amenable number.

165011249 is a deficient number, since it is larger than the sum of its proper divisors (12693187).

165011249 is a wasteful number, since it uses less digits than its factorization.

165011249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12693186.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 165011249 is about 12845.6704379336. The cubic root of 165011249 is about 548.4931193214.

The spelling of 165011249 in words is "one hundred sixty-five million, eleven thousand, two hundred forty-nine".