161461205 has 8 divisors (see below), whose sum is σ = 196930104. Its totient is φ = 127051200.

The previous prime is 161461199. The next prime is 161461207. The reversal of 161461205 is 502164161.

It can be written as a sum of positive squares in 4 ways, for example, as 5885476 + 155575729 = 2426^2 + 12473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161461205 - 2¹⁸ = 161199061 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 (161461207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264386 + ... + 264995.

It is an arithmetic number, because the mean of its divisors is an integer number (24616263).

Almost surely, 2^161461205 is an apocalyptic number.

It is an amenable number.

161461205 is a deficient number, since it is larger than the sum of its proper divisors (35468899).

161461205 is an equidigital number, since it uses as much as digits as its factorization.

161461205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529447.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 161461205 is about 12706.7385666032. The cubic root of 161461205 is about 544.5311513609.

The spelling of 161461205 in words is "one hundred sixty-one million, four hundred sixty-one thousand, two hundred five".