161104145 has 8 divisors (see below), whose sum is σ = 193774056. Its totient is φ = 128583936.

The previous prime is 161104133. The next prime is 161104271. The reversal of 161104145 is 541401161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1915456 + 159188689 = 1384^2 + 12617^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 161104145 - 2¹⁸ = 160842001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161104145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35042 + ... + 39371.

It is an arithmetic number, because the mean of its divisors is an integer number (24221757).

Almost surely, 2^161104145 is an apocalyptic number.

It is an amenable number.

161104145 is a deficient number, since it is larger than the sum of its proper divisors (32669911).

161104145 is an equidigital number, since it uses as much as digits as its factorization.

161104145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74851.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 161104145 is about 12692.6807649133. The cubic root of 161104145 is about 544.1294577731.

The spelling of 161104145 in words is "one hundred sixty-one million, one hundred four thousand, one hundred forty-five".