2162621 has 8 divisors (see below), whose sum is σ = 2389824. Its totient is φ = 1946560.

The previous prime is 2162603. The next prime is 2162623. The reversal of 2162621 is 1262612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2162621 - 2⁶ = 2162557 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2162593 and 2162602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 3156.

It is an arithmetic number, because the mean of its divisors is an integer number (298728).

2^2162621 is an apocalyptic number.

It is an amenable number.

2162621 is a deficient number, since it is larger than the sum of its proper divisors (227203).

2162621 is a wasteful number, since it uses less digits than its factorization.

2162621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571.

The product of its digits is 288, while the sum is 20.

The square root of 2162621 is about 1470.5852576440. The cubic root of 2162621 is about 129.3183452064.

Subtracting from 2162621 its reverse (1262612), we obtain a palindrome (900009).

The spelling of 2162621 in words is "two million, one hundred sixty-two thousand, six hundred twenty-one".