162541009 has 2 divisors, whose sum is σ = 162541010. Its totient is φ = 162541008.

The previous prime is 162541007. The next prime is 162541013. The reversal of 162541009 is 900145261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138579984 + 23961025 = 11772^2 + 4895^2 .

It is a cyclic number.

It is not a de Polignac number, because 162541009 - 2¹ = 162541007 is a prime.

Together with 162541007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (162541007) 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 as a sum of consecutive naturals, namely, 81270504 + 81270505.

It is an arithmetic number, because the mean of its divisors is an integer number (81270505).

Almost surely, 2^162541009 is an apocalyptic number.

It is an amenable number.

162541009 is a deficient number, since it is larger than the sum of its proper divisors (1).

162541009 is an equidigital number, since it uses as much as digits as its factorization.

162541009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 162541009 is about 12749.1571878301. The cubic root of 162541009 is about 545.7423422139.

The spelling of 162541009 in words is "one hundred sixty-two million, five hundred forty-one thousand, nine".