161409027 has 24 divisors (see below), whose sum is σ = 234184368. Its totient is φ = 98841600.

The previous prime is 161409023. The next prime is 161409049. The reversal of 161409027 is 720904161.

It is a happy number.

It is not a de Polignac number, because 161409027 - 2² = 161409023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161408985 and 161409003.

It is not an unprimeable number, because it can be changed into a prime (161409023) 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 23 ways as a sum of consecutive naturals, for example, 121527 + ... + 122847.

It is an arithmetic number, because the mean of its divisors is an integer number (9757682).

Almost surely, 2^161409027 is an apocalyptic number.

161409027 is a deficient number, since it is larger than the sum of its proper divisors (72775341).

161409027 is a wasteful number, since it uses less digits than its factorization.

161409027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 161409027 is about 12704.6852381316. The cubic root of 161409027 is about 544.4724879241.

The spelling of 161409027 in words is "one hundred sixty-one million, four hundred nine thousand, twenty-seven".