161246642 has 4 divisors (see below), whose sum is σ = 241869966. Its totient is φ = 80623320.

The previous prime is 161246639. The next prime is 161246651. The reversal of 161246642 is 246642161.

161246642 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 246642161 = 6277 ⋅39293.

It can be written as a sum of positive squares in only one way, i.e., 116877721 + 44368921 = 10811^2 + 6661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161246599 and 161246608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40311659 + ... + 40311662.

Almost surely, 2^161246642 is an apocalyptic number.

161246642 is a deficient number, since it is larger than the sum of its proper divisors (80623324).

161246642 is an equidigital number, since it uses as much as digits as its factorization.

161246642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80623323.

The product of its digits is 13824, while the sum is 32.

The square root of 161246642 is about 12698.2928773910. The cubic root of 161246642 is about 544.2898384305.

The spelling of 161246642 in words is "one hundred sixty-one million, two hundred forty-six thousand, six hundred forty-two".