165396542 has 16 divisors (see below), whose sum is σ = 265198752. Its totient is φ = 77172480.

The previous prime is 165396527. The next prime is 165396571. The reversal of 165396542 is 245693561.

It is a super-2 number, since 2×165396542² = 54712032211115528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 165396542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41963 + ... + 45734.

It is an arithmetic number, because the mean of its divisors is an integer number (16574922).

Almost surely, 2^165396542 is an apocalyptic number.

165396542 is a deficient number, since it is larger than the sum of its proper divisors (99802210).

165396542 is a wasteful number, since it uses less digits than its factorization.

165396542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87763.

The product of its digits is 194400, while the sum is 41.

The square root of 165396542 is about 12860.6586923065. The cubic root of 165396542 is about 548.9196888061.

The spelling of 165396542 in words is "one hundred sixty-five million, three hundred ninety-six thousand, five hundred forty-two".