2003122405 has 16 divisors (see below), whose sum is σ = 2539912320. Its totient is φ = 1512364608.

The previous prime is 2003122399. The next prime is 2003122483. The reversal of 2003122405 is 5042213002.

It is a cyclic number.

It is not a de Polignac number, because 2003122405 - 2³ = 2003122397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15102 + ... + 65071.

It is an arithmetic number, because the mean of its divisors is an integer number (158744520).

Almost surely, 2^2003122405 is an apocalyptic number.

It is an amenable number.

2003122405 is a deficient number, since it is larger than the sum of its proper divisors (536789915).

2003122405 is a wasteful number, since it uses less digits than its factorization.

2003122405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80460.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2003122405 is about 44756.2554845689. The cubic root of 2003122405 is about 1260.5763729467.

Adding to 2003122405 its reverse (5042213002), we get a palindrome (7045335407).

It can be divided in two parts, 20031 and 22405, that added together give a square (42436 = 206²).

The spelling of 2003122405 in words is "two billion, three million, one hundred twenty-two thousand, four hundred five".