161290282 has 4 divisors (see below), whose sum is σ = 241935426. Its totient is φ = 80645140.

The previous prime is 161290267. The next prime is 161290301. The reversal of 161290282 is 282092161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 282092161 = 13 ⋅21699397.

It can be written as a sum of positive squares in only one way, i.e., 99022401 + 62267881 = 9951^2 + 7891^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40322569 + ... + 40322572.

Almost surely, 2^161290282 is an apocalyptic number.

161290282 is a deficient number, since it is larger than the sum of its proper divisors (80645144).

161290282 is an equidigital number, since it uses as much as digits as its factorization.

161290282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80645143.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 161290282 is about 12700.0111023574. The cubic root of 161290282 is about 544.3389364371.

The spelling of 161290282 in words is "one hundred sixty-one million, two hundred ninety thousand, two hundred eighty-two".