162541861 has 2 divisors, whose sum is σ = 162541862. Its totient is φ = 162541860.

The previous prime is 162541859. The next prime is 162541867. The reversal of 162541861 is 168145261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161137636 + 1404225 = 12694^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 162541861 - 2¹ = 162541859 is a prime.

Together with 162541859, 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 (162541867) 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, 81270930 + 81270931.

It is an arithmetic number, because the mean of its divisors is an integer number (81270931).

Almost surely, 2^162541861 is an apocalyptic number.

It is an amenable number.

162541861 is a deficient number, since it is larger than the sum of its proper divisors (1).

162541861 is an equidigital number, since it uses as much as digits as its factorization.

162541861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 162541861 is about 12749.1906017598. The cubic root of 162541861 is about 545.7432957613.

The spelling of 162541861 in words is "one hundred sixty-two million, five hundred forty-one thousand, eight hundred sixty-one".