165130445 has 8 divisors (see below), whose sum is σ = 203512344. Its totient is φ = 128533824.

The previous prime is 165130423. The next prime is 165130447. The reversal of 165130445 is 544031561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44262409 + 120868036 = 6653^2 + 10994^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165130445 - 2¹⁶ = 165064909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165130447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446114 + ... + 446483.

It is an arithmetic number, because the mean of its divisors is an integer number (25439043).

Almost surely, 2^165130445 is an apocalyptic number.

It is an amenable number.

165130445 is a deficient number, since it is larger than the sum of its proper divisors (38381899).

165130445 is an equidigital number, since it uses as much as digits as its factorization.

165130445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892639.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 165130445 is about 12850.3091402503. The cubic root of 165130445 is about 548.6251556736.

The spelling of 165130445 in words is "one hundred sixty-five million, one hundred thirty thousand, four hundred forty-five".