165542041 has 12 divisors (see below), whose sum is σ = 202705680. Its totient is φ = 134424360.

The previous prime is 165542011. The next prime is 165542081. The reversal of 165542041 is 140245561.

It is not a de Polignac number, because 165542041 - 2⁷ = 165541913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165542011) 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 11 ways as a sum of consecutive naturals, for example, 87975 + ... + 89836.

It is an arithmetic number, because the mean of its divisors is an integer number (16892140).

Almost surely, 2^165542041 is an apocalyptic number.

It is an amenable number.

165542041 is a deficient number, since it is larger than the sum of its proper divisors (37163639).

165542041 is a wasteful number, since it uses less digits than its factorization.

165542041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177844 (or 177837 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 165542041 is about 12866.3141963812. The cubic root of 165542041 is about 549.0806028063.

The spelling of 165542041 in words is "one hundred sixty-five million, five hundred forty-two thousand, forty-one".