161405395 has 8 divisors (see below), whose sum is σ = 205079904. Its totient is φ = 121528704.

The previous prime is 161405357. The next prime is 161405401. The reversal of 161405395 is 593504161.

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 161405395 - 2⁹ = 161404883 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 161405395.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949359 + ... + 949528.

It is an arithmetic number, because the mean of its divisors is an integer number (25634988).

Almost surely, 2^161405395 is an apocalyptic number.

161405395 is a deficient number, since it is larger than the sum of its proper divisors (43674509).

161405395 is a wasteful number, since it uses less digits than its factorization.

161405395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898909.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 161405395 is about 12704.5422979342. The cubic root of 161405395 is about 544.4684040160.

The spelling of 161405395 in words is "one hundred sixty-one million, four hundred five thousand, three hundred ninety-five".