2169021 has 8 divisors (see below), whose sum is σ = 3044320. Its totient is φ = 1369872.

The previous prime is 2169007. The next prime is 2169029. The reversal of 2169021 is 1209612.

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

It is not a de Polignac number, because 2169021 - 2⁵ = 2168989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169029) 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, 18970 + ... + 19083.

It is an arithmetic number, because the mean of its divisors is an integer number (380540).

2^2169021 is an apocalyptic number.

It is an amenable number.

2169021 is a deficient number, since it is larger than the sum of its proper divisors (875299).

2169021 is a wasteful number, since it uses less digits than its factorization.

2169021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38075.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2169021 is about 1472.7596545262. The cubic root of 2169021 is about 129.4457866027.

It can be divided in two parts, 21 and 69021, that multiplied together give a palindrome (1449441).

The spelling of 2169021 in words is "two million, one hundred sixty-nine thousand, twenty-one".