2069921 has 4 divisors (see below), whose sum is σ = 2365632. Its totient is φ = 1774212.

The previous prime is 2069911. The next prime is 2069923. The reversal of 2069921 is 1299602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1299602 = 2 ⋅649801.

It is a cyclic number.

It is not a de Polignac number, because 2069921 - 2⁶ = 2069857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2069923) 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, 147845 + ... + 147858.

It is an arithmetic number, because the mean of its divisors is an integer number (591408).

2^2069921 is an apocalyptic number.

It is an amenable number.

2069921 is a deficient number, since it is larger than the sum of its proper divisors (295711).

2069921 is an equidigital number, since it uses as much as digits as its factorization.

2069921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295710.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2069921 is about 1438.7220023340. The cubic root of 2069921 is about 127.4435685168.

The spelling of 2069921 in words is "two million, sixty-nine thousand, nine hundred twenty-one".