161190742 has 4 divisors (see below), whose sum is σ = 241786116. Its totient is φ = 80595370.

The previous prime is 161190713. The next prime is 161190749. The reversal of 161190742 is 247091161.

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 (161190749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40297684 + ... + 40297687.

It is an arithmetic number, because the mean of its divisors is an integer number (60446529).

Almost surely, 2^161190742 is an apocalyptic number.

161190742 is a deficient number, since it is larger than the sum of its proper divisors (80595374).

161190742 is an equidigital number, since it uses as much as digits as its factorization.

161190742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80595373.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 161190742 is about 12696.0916033242. The cubic root of 161190742 is about 544.2269341364.

The spelling of 161190742 in words is "one hundred sixty-one million, one hundred ninety thousand, seven hundred forty-two".