165012545 has 4 divisors (see below), whose sum is σ = 198015060. Its totient is φ = 132010032.

The previous prime is 165012541. The next prime is 165012553. The reversal of 165012545 is 545210561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26173456 + 138839089 = 5116^2 + 11783^2 .

It is a cyclic number.

It is not a de Polignac number, because 165012545 - 2² = 165012541 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (165012541) 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, 16501250 + ... + 16501259.

It is an arithmetic number, because the mean of its divisors is an integer number (49503765).

Almost surely, 2^165012545 is an apocalyptic number.

It is an amenable number.

165012545 is a deficient number, since it is larger than the sum of its proper divisors (33002515).

165012545 is an equidigital number, since it uses as much as digits as its factorization.

165012545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33002514.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 165012545 is about 12845.7208828466. The cubic root of 165012545 is about 548.4945552745.

The spelling of 165012545 in words is "one hundred sixty-five million, twelve thousand, five hundred forty-five".