2005143925 has 12 divisors (see below), whose sum is σ = 2520440740. Its totient is φ = 1582139520.

The previous prime is 2005143857. The next prime is 2005143961. The reversal of 2005143925 is 5293415002.

It can be written as a sum of positive squares in 6 ways, for example, as 110544196 + 1894599729 = 10514^2 + 43527^2 .

It is not a de Polignac number, because 2005143925 - 2¹⁷ = 2005012853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547530 + ... + 551179.

Almost surely, 2^2005143925 is an apocalyptic number.

2005143925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2005143925 is a deficient number, since it is larger than the sum of its proper divisors (515296815).

2005143925 is a wasteful number, since it uses less digits than its factorization.

2005143925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098792 (or 1098787 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2005143925 is about 44778.8334484051. The cubic root of 2005143925 is about 1261.0002817395. Note that the first 3 decimals are identical.

Adding to 2005143925 its reverse (5293415002), we get a palindrome (7298558927).

The spelling of 2005143925 in words is "two billion, five million, one hundred forty-three thousand, nine hundred twenty-five".