161461 has 2 divisors, whose sum is σ = 161462. Its totient is φ = 161460.

The previous prime is 161459. The next prime is 161471. The reversal of 161461 is 164161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119025 + 42436 = 345^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 161461 - 2¹ = 161459 is a prime.

Together with 161459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161411) 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 as a sum of consecutive naturals, namely, 80730 + 80731.

It is an arithmetic number, because the mean of its divisors is an integer number (80731).

2¹⁶¹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

161461 is a deficient number, since it is larger than the sum of its proper divisors (1).

161461 is an equidigital number, since it uses as much as digits as its factorization.

161461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 161461 is about 401.8220999398. The cubic root of 161461 is about 54.4530920905.

The spelling of 161461 in words is "one hundred sixty-one thousand, four hundred sixty-one".