161675242 has 4 divisors (see below), whose sum is σ = 242512866. Its totient is φ = 80837620.

The previous prime is 161675233. The next prime is 161675243. The reversal of 161675242 is 242576161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242576161 = 487 ⋅498103.

It can be written as a sum of positive squares in only one way, i.e., 137851081 + 23824161 = 11741^2 + 4881^2 .

It is a super-2 number, since 2×161675242² = 52277767751517128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161675198 and 161675207.

It is not an unprimeable number, because it can be changed into a prime (161675243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40418809 + ... + 40418812.

Almost surely, 2^161675242 is an apocalyptic number.

161675242 is a deficient number, since it is larger than the sum of its proper divisors (80837624).

161675242 is an equidigital number, since it uses as much as digits as its factorization.

161675242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80837623.

The product of its digits is 20160, while the sum is 34.

The square root of 161675242 is about 12715.1579620546. The cubic root of 161675242 is about 544.7716598089.

The spelling of 161675242 in words is "one hundred sixty-one million, six hundred seventy-five thousand, two hundred forty-two".