162642121 has 16 divisors (see below), whose sum is σ = 177060240. Its totient is φ = 149022720.

The previous prime is 162642113. The next prime is 162642127. The reversal of 162642121 is 121246261.

It is a happy number.

162642121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 12702096 + 149940025 = 3564^2 + 12245^2 .

It is a cyclic number.

It is not a de Polignac number, because 162642121 - 2³ = 162642113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162642127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42145 + ... + 45841.

It is an arithmetic number, because the mean of its divisors is an integer number (11066265).

Almost surely, 2^162642121 is an apocalyptic number.

It is an amenable number.

162642121 is a deficient number, since it is larger than the sum of its proper divisors (14418119).

162642121 is a wasteful number, since it uses less digits than its factorization.

162642121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804.

The product of its digits is 1152, while the sum is 25.

The square root of 162642121 is about 12753.1220099237. The cubic root of 162642121 is about 545.8554821979.

Adding to 162642121 its reverse (121246261), we get a palindrome (283888382).

The spelling of 162642121 in words is "one hundred sixty-two million, six hundred forty-two thousand, one hundred twenty-one".