2001250040 has 16 divisors (see below), whose sum is σ = 4502812680. Its totient is φ = 800500000.

The previous prime is 2001250037. The next prime is 2001250049. The reversal of 2001250040 is 400521002.

It is a junction number, because it is equal to n+sod(n) for n = 2001249997 and 2001250024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001250049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25015586 + ... + 25015665.

Almost surely, 2^2001250040 is an apocalyptic number.

2001250040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001250040 is an abundant number, since it is smaller than the sum of its proper divisors (2501562640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001250040 is a wasteful number, since it uses less digits than its factorization.

2001250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50031262 (or 50031258 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2001250040 is about 44735.3332389511. Note that the first 3 decimals coincide. The cubic root of 2001250040 is about 1260.1834871778.

Adding to 2001250040 its reverse (400521002), we get a palindrome (2401771042).

The spelling of 2001250040 in words is "two billion, one million, two hundred fifty thousand, forty".