2438921 has 4 divisors (see below), whose sum is σ = 2473344. Its totient is φ = 2404500.

The previous prime is 2438911. The next prime is 2438927. The reversal of 2438921 is 1298342.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2438921 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2438927) 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, 17105 + ... + 17246.

It is an arithmetic number, because the mean of its divisors is an integer number (618336).

2^2438921 is an apocalyptic number.

It is an amenable number.

2438921 is a deficient number, since it is larger than the sum of its proper divisors (34423).

2438921 is an equidigital number, since it uses as much as digits as its factorization.

2438921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34422.

The product of its digits is 3456, while the sum is 29.

The square root of 2438921 is about 1561.7045175064. The cubic root of 2438921 is about 134.6064625128.

The spelling of 2438921 in words is "two million, four hundred thirty-eight thousand, nine hundred twenty-one".