2005420125 has 16 divisors (see below), whose sum is σ = 3337019712. Its totient is φ = 1069557200.

The previous prime is 2005420073. The next prime is 2005420129. The reversal of 2005420125 is 5210245002.

It is a happy number.

It is not a de Polignac number, because 2005420125 - 2⁶ = 2005420061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005420129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2673519 + ... + 2674268.

It is an arithmetic number, because the mean of its divisors is an integer number (208563732).

Almost surely, 2^2005420125 is an apocalyptic number.

2005420125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2005420125 is a deficient number, since it is larger than the sum of its proper divisors (1331599587).

2005420125 is an equidigital number, since it uses as much as digits as its factorization.

2005420125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5347805 (or 5347795 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2005420125 is about 44781.9173886068. The cubic root of 2005420125 is about 1261.0581782132.

Adding to 2005420125 its reverse (5210245002), we get a palindrome (7215665127).

The spelling of 2005420125 in words is "two billion, five million, four hundred twenty thousand, one hundred twenty-five".