161134642 has 32 divisors (see below), whose sum is σ = 258785280. Its totient is φ = 75084240.

The previous prime is 161134627. The next prime is 161134651. The reversal of 161134642 is 246431161.

It is a self number, because there is not a number n which added to its sum of digits gives 161134642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336159 + ... + 336637.

It is an arithmetic number, because the mean of its divisors is an integer number (8087040).

Almost surely, 2^161134642 is an apocalyptic number.

161134642 is a deficient number, since it is larger than the sum of its proper divisors (97650638).

161134642 is a wasteful number, since it uses less digits than its factorization.

161134642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its digits is 3456, while the sum is 28.

The square root of 161134642 is about 12693.8820697216. The cubic root of 161134642 is about 544.1637901591.

The spelling of 161134642 in words is "one hundred sixty-one million, one hundred thirty-four thousand, six hundred forty-two".