162021001 has 2 divisors, whose sum is σ = 162021002. Its totient is φ = 162021000.

The previous prime is 162020987. The next prime is 162021059. The reversal of 162021001 is 100120261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 705600 = 12701^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 162021001 - 2¹¹ = 162018953 is a prime.

It is not a weakly prime, because it can be changed into another prime (162021061) 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, 81010500 + 81010501.

It is an arithmetic number, because the mean of its divisors is an integer number (81010501).

Almost surely, 2^162021001 is an apocalyptic number.

It is an amenable number.

162021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

162021001 is an equidigital number, since it uses as much as digits as its factorization.

162021001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 162021001 is about 12728.7470318174. The cubic root of 162021001 is about 545.1597332204.

Adding to 162021001 its reverse (100120261), we get a palindrome (262141262).

The spelling of 162021001 in words is "one hundred sixty-two million, twenty-one thousand, one".