162621 has 16 divisors (see below), whose sum is σ = 254400. Its totient is φ = 102384.

The previous prime is 162611. The next prime is 162623. The reversal of 162621 is 126261.

It is a happy number.

It is not a de Polignac number, because 162621 - 2⁶ = 162557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 162594 and 162603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162623) 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, 355 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (15900).

2¹⁶²⁶²¹ is an apocalyptic number.

It is an amenable number.

162621 is a deficient number, since it is larger than the sum of its proper divisors (91779).

162621 is a wasteful number, since it uses less digits than its factorization.

162621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 162621 is about 403.2629415158. The cubic root of 162621 is about 54.5831852582.

Adding to 162621 its reverse (126261), we get a palindrome (288882).

The spelling of 162621 in words is "one hundred sixty-two thousand, six hundred twenty-one".