161022742 has 32 divisors (see below), whose sum is σ = 271192320. Its totient is φ = 71331840.

The previous prime is 161022731. The next prime is 161022749. The reversal of 161022742 is 247220161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161022749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36934 + ... + 41062.

It is an arithmetic number, because the mean of its divisors is an integer number (8474760).

Almost surely, 2^161022742 is an apocalyptic number.

161022742 is a deficient number, since it is larger than the sum of its proper divisors (110169578).

161022742 is a wasteful number, since it uses less digits than its factorization.

161022742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 161022742 is about 12689.4736691480. The cubic root of 161022742 is about 544.0377960872.

The spelling of 161022742 in words is "one hundred sixty-one million, twenty-two thousand, seven hundred forty-two".