161712542 has 4 divisors (see below), whose sum is σ = 242568816. Its totient is φ = 80856270.

The previous prime is 161712541. The next prime is 161712583. The reversal of 161712542 is 245217161.

161712542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161712541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40428134 + ... + 40428137.

It is an arithmetic number, because the mean of its divisors is an integer number (60642204).

Almost surely, 2^161712542 is an apocalyptic number.

161712542 is a deficient number, since it is larger than the sum of its proper divisors (80856274).

161712542 is an equidigital number, since it uses as much as digits as its factorization.

161712542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80856273.

The product of its digits is 3360, while the sum is 29.

The square root of 161712542 is about 12716.6246307737. The cubic root of 161712542 is about 544.8135512373.

The spelling of 161712542 in words is "one hundred sixty-one million, seven hundred twelve thousand, five hundred forty-two".