2003406421 has 8 divisors (see below), whose sum is σ = 2139128640. Its totient is φ = 1871735712.

The previous prime is 2003406401. The next prime is 2003406439. The reversal of 2003406421 is 1246043002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2003406421 - 2²⁷ = 1869188693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003406392 and 2003406401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003406401) 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, 1011856 + ... + 1013833.

It is an arithmetic number, because the mean of its divisors is an integer number (267391080).

Almost surely, 2^2003406421 is an apocalyptic number.

It is an amenable number.

2003406421 is a deficient number, since it is larger than the sum of its proper divisors (135722219).

2003406421 is a wasteful number, since it uses less digits than its factorization.

2003406421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025755.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2003406421 is about 44759.4282917019. The cubic root of 2003406421 is about 1260.6359477616.

Adding to 2003406421 its reverse (1246043002), we get a palindrome (3249449423).

The spelling of 2003406421 in words is "two billion, three million, four hundred six thousand, four hundred twenty-one".