161142361 has 2 divisors, whose sum is σ = 161142362. Its totient is φ = 161142360.

The previous prime is 161142353. The next prime is 161142379. The reversal of 161142361 is 163241161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160275600 + 866761 = 12660^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 161142361 - 2³ = 161142353 is a prime.

It is not a weakly prime, because it can be changed into another prime (161143361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80571180 + 80571181.

It is an arithmetic number, because the mean of its divisors is an integer number (80571181).

Almost surely, 2^161142361 is an apocalyptic number.

It is an amenable number.

161142361 is a deficient number, since it is larger than the sum of its proper divisors (1).

161142361 is an equidigital number, since it uses as much as digits as its factorization.

161142361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 161142361 is about 12694.1861101845. The cubic root of 161142361 is about 544.1724792347.

The spelling of 161142361 in words is "one hundred sixty-one million, one hundred forty-two thousand, three hundred sixty-one".