161203142 has 8 divisors (see below), whose sum is σ = 242870616. Its totient is φ = 80246272.

The previous prime is 161203111. The next prime is 161203151. The reversal of 161203142 is 241302161.

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

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, 177083 + ... + 177990.

It is an arithmetic number, because the mean of its divisors is an integer number (30358827).

Almost surely, 2^161203142 is an apocalyptic number.

161203142 is a deficient number, since it is larger than the sum of its proper divisors (81667474).

161203142 is a wasteful number, since it uses less digits than its factorization.

161203142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355302.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 161203142 is about 12696.5799331946. The cubic root of 161203142 is about 544.2408891168.

The spelling of 161203142 in words is "one hundred sixty-one million, two hundred three thousand, one hundred forty-two".