165124849 has 4 divisors (see below), whose sum is σ = 165190564. Its totient is φ = 165059136.

The previous prime is 165124829. The next prime is 165124871. The reversal of 165124849 is 948421561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 948421561 = 10357 ⋅91573.

It can be written as a sum of positive squares in 2 ways, for example, as 75690000 + 89434849 = 8700^2 + 9457^2 .

It is a cyclic number.

It is not a de Polignac number, because 165124849 - 2⁷ = 165124721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165124819) 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, 28932 + ... + 34165.

It is an arithmetic number, because the mean of its divisors is an integer number (41297641).

Almost surely, 2^165124849 is an apocalyptic number.

It is an amenable number.

165124849 is a deficient number, since it is larger than the sum of its proper divisors (65715).

165124849 is an equidigital number, since it uses as much as digits as its factorization.

165124849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65714.

The product of its digits is 69120, while the sum is 40.

The square root of 165124849 is about 12850.0914004532. The cubic root of 165124849 is about 548.6189582680.

The spelling of 165124849 in words is "one hundred sixty-five million, one hundred twenty-four thousand, eight hundred forty-nine".