165972542 has 8 divisors (see below), whose sum is σ = 249480000. Its totient is φ = 82812544.

The previous prime is 165972523. The next prime is 165972563. The reversal of 165972542 is 245279561.

165972542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165972542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85667 + ... + 87582.

It is an arithmetic number, because the mean of its divisors is an integer number (31185000).

Almost surely, 2^165972542 is an apocalyptic number.

165972542 is a deficient number, since it is larger than the sum of its proper divisors (83507458).

165972542 is a wasteful number, since it uses less digits than its factorization.

165972542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173730.

The product of its digits is 151200, while the sum is 41.

The square root of 165972542 is about 12883.0331056006. The cubic root of 165972542 is about 549.5561620390.

The spelling of 165972542 in words is "one hundred sixty-five million, nine hundred seventy-two thousand, five hundred forty-two".