161234461 has 4 divisors (see below), whose sum is σ = 166794300. Its totient is φ = 155674624.

The previous prime is 161234459. The next prime is 161234471. The reversal of 161234461 is 164432161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164432161 = 2269 ⋅72469.

It can be written as a sum of positive squares in 2 ways, for example, as 121418361 + 39816100 = 11019^2 + 6310^2 .

It is a cyclic number.

It is not a de Polignac number, because 161234461 - 2¹ = 161234459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161234471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779876 + ... + 2779933.

It is an arithmetic number, because the mean of its divisors is an integer number (41698575).

Almost surely, 2^161234461 is an apocalyptic number.

It is an amenable number.

161234461 is a deficient number, since it is larger than the sum of its proper divisors (5559839).

161234461 is an equidigital number, since it uses as much as digits as its factorization.

161234461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559838.

The product of its digits is 3456, while the sum is 28.

The square root of 161234461 is about 12697.8132369318. The cubic root of 161234461 is about 544.2761323850.

The spelling of 161234461 in words is "one hundred sixty-one million, two hundred thirty-four thousand, four hundred sixty-one".