2146621 has 4 divisors (see below), whose sum is σ = 2150172. Its totient is φ = 2143072.

The previous prime is 2146619. The next prime is 2146633. The reversal of 2146621 is 1266412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 1920996 = 475^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146621 - 2¹ = 2146619 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2146592 and 2146601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (537543).

2^2146621 is an apocalyptic number.

It is an amenable number.

2146621 is a deficient number, since it is larger than the sum of its proper divisors (3551).

2146621 is an equidigital number, since it uses as much as digits as its factorization.

2146621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550.

The product of its digits is 576, while the sum is 22.

The square root of 2146621 is about 1465.1351473499. The cubic root of 2146621 is about 128.9986378880.

The spelling of 2146621 in words is "two million, one hundred forty-six thousand, six hundred twenty-one".