2001250000 has 80 divisors (see below), whose sum is σ = 4849792272. Its totient is φ = 800000000.

The previous prime is 2001249983. The next prime is 2001250019. The reversal of 2001250000 is 521002.

It can be written as a sum of positive squares in 8 ways, for example, as 1968164496 + 33085504 = 44364^2 + 5752^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 1249200 + ... + 1250800.

Almost surely, 2^2001250000 is an apocalyptic number.

2001250000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2424896136).

2001250000 is an abundant number, since it is smaller than the sum of its proper divisors (2848542272).

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

2001250000 is an frugal number, since it uses more digits than its factorization.

2001250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 2001250000 is about 44735.3327918772. The cubic root of 2001250000 is about 1260.1834787818.

Adding to 2001250000 its reverse (521002), we get a palindrome (2001771002).

The spelling of 2001250000 in words is "two billion, one million, two hundred fifty thousand".