161451 has 6 divisors (see below), whose sum is σ = 233220. Its totient is φ = 107628.

The previous prime is 161411. The next prime is 161453. The reversal of 161451 is 154161.

161451 is a `hidden beast` number, since 1 + 614 + 51 = 666.

It is not a de Polignac number, because 161451 - 2⁶ = 161387 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161451.

It is not an unprimeable number, because it can be changed into a prime (161453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8961 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (38870).

2¹⁶¹⁴⁵¹ is an apocalyptic number.

161451 is a deficient number, since it is larger than the sum of its proper divisors (71769).

161451 is a wasteful number, since it uses less digits than its factorization.

161451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17945 (or 17942 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 161451 is about 401.8096564295. The cubic root of 161451 is about 54.4519678930.

The spelling of 161451 in words is "one hundred sixty-one thousand, four hundred fifty-one".