2382421 has 4 divisors (see below), whose sum is σ = 2385612. Its totient is φ = 2379232.

The previous prime is 2382407. The next prime is 2382449. The reversal of 2382421 is 1242832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 1876900 = 711^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2382421 - 2⁵ = 2382389 is a prime.

It is a Duffinian number.

2382421 is a lucky number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 2382392 and 2382401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2382451) 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, 195 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (596403).

2^2382421 is an apocalyptic number.

It is an amenable number.

2382421 is a deficient number, since it is larger than the sum of its proper divisors (3191).

2382421 is a wasteful number, since it uses less digits than its factorization.

2382421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190.

The product of its digits is 768, while the sum is 22.

The square root of 2382421 is about 1543.5093132210. The cubic root of 2382421 is about 133.5589008185.

Subtracting from 2382421 its product of digits (768), we obtain a triangular number (2381653 = T₂₁₈₂).

The spelling of 2382421 in words is "two million, three hundred eighty-two thousand, four hundred twenty-one".