161052805 has 8 divisors (see below), whose sum is σ = 199927800. Its totient is φ = 124399296.

The previous prime is 161052803. The next prime is 161052809. The reversal of 161052805 is 508250161.

It can be written as a sum of positive squares in 4 ways, for example, as 12773476 + 148279329 = 3574^2 + 12177^2 .

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 161052805 - 2¹ = 161052803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161052803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555210 + ... + 555499.

It is an arithmetic number, because the mean of its divisors is an integer number (24990975).

Almost surely, 2^161052805 is an apocalyptic number.

It is an amenable number.

161052805 is a deficient number, since it is larger than the sum of its proper divisors (38874995).

161052805 is a wasteful number, since it uses less digits than its factorization.

161052805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110743.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 161052805 is about 12690.6581783610. The cubic root of 161052805 is about 544.0716513267.

The spelling of 161052805 in words is "one hundred sixty-one million, fifty-two thousand, eight hundred five".