165142265 has 4 divisors (see below), whose sum is σ = 198170724. Its totient is φ = 132113808.

The previous prime is 165142261. The next prime is 165142283. The reversal of 165142265 is 562241561.

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 117917881 + 47224384 = 10859^2 + 6872^2 .

It is a cyclic number.

It is not a de Polignac number, because 165142265 - 2² = 165142261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165142261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16514222 + ... + 16514231.

It is an arithmetic number, because the mean of its divisors is an integer number (49542681).

Almost surely, 2^165142265 is an apocalyptic number.

It is an amenable number.

165142265 is a deficient number, since it is larger than the sum of its proper divisors (33028459).

165142265 is an equidigital number, since it uses as much as digits as its factorization.

165142265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33028458.

The product of its digits is 14400, while the sum is 32.

The square root of 165142265 is about 12850.7690431351. The cubic root of 165142265 is about 548.6382455163.

The spelling of 165142265 in words is "one hundred sixty-five million, one hundred forty-two thousand, two hundred sixty-five".