161452685 has 4 divisors (see below), whose sum is σ = 193743228. Its totient is φ = 129162144.

The previous prime is 161452637. The next prime is 161452691. The reversal of 161452685 is 586254161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586254161 = 461 ⋅1271701.

It can be written as a sum of positive squares in 2 ways, for example, as 116683204 + 44769481 = 10802^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 161452685 - 2¹⁸ = 161190541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16145264 + ... + 16145273.

It is an arithmetic number, because the mean of its divisors is an integer number (48435807).

Almost surely, 2^161452685 is an apocalyptic number.

It is an amenable number.

161452685 is a deficient number, since it is larger than the sum of its proper divisors (32290543).

161452685 is an equidigital number, since it uses as much as digits as its factorization.

161452685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32290542.

The product of its digits is 57600, while the sum is 38.

The square root of 161452685 is about 12706.4033069945. The cubic root of 161452685 is about 544.5215732355.

The spelling of 161452685 in words is "one hundred sixty-one million, four hundred fifty-two thousand, six hundred eighty-five".