161285242 has 8 divisors (see below), whose sum is σ = 241982100. Its totient is φ = 80624544.

The previous prime is 161285237. The next prime is 161285263. The reversal of 161285242 is 242582161.

It can be written as a sum of positive squares in 2 ways, for example, as 160807761 + 477481 = 12681^2 + 691^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 10984 + ... + 21052.

Almost surely, 2^161285242 is an apocalyptic number.

161285242 is a deficient number, since it is larger than the sum of its proper divisors (80696858).

161285242 is a wasteful number, since it uses less digits than its factorization.

161285242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18080.

The product of its digits is 7680, while the sum is 31.

The square root of 161285242 is about 12699.8126757838. The cubic root of 161285242 is about 544.3332665422. Note that the first 3 decimals are identical.

The spelling of 161285242 in words is "one hundred sixty-one million, two hundred eighty-five thousand, two hundred forty-two".