165642034 has 4 divisors (see below), whose sum is σ = 248463054. Its totient is φ = 82821016.

The previous prime is 165641989. The next prime is 165642041. The reversal of 165642034 is 430246561.

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

It can be written as a sum of positive squares in only one way, i.e., 104755225 + 60886809 = 10235^2 + 7803^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 165641987 and 165642005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41410507 + ... + 41410510.

Almost surely, 2^165642034 is an apocalyptic number.

165642034 is a deficient number, since it is larger than the sum of its proper divisors (82821020).

165642034 is an equidigital number, since it uses as much as digits as its factorization.

165642034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82821019.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 165642034 is about 12870.1994545539. The cubic root of 165642034 is about 549.1911349817.

Adding to 165642034 its reverse (430246561), we get a palindrome (595888595).

The spelling of 165642034 in words is "one hundred sixty-five million, six hundred forty-two thousand, thirty-four".