2250000 has 105 divisors (see below), whose sum is σ = 7870993.
Its totient is φ = 600000.
The previous prime is 2249987. The next prime is 2250013. The reversal of 2250000 is 522.
Adding to 2250000 its reverse (522), we get a palindrome (2250522).
The square root of 2250000 is 1500.
It is a perfect power (a square), and thus also a powerful number.
It is an interprime number because it is at equal distance from previous prime (2249987) and next prime (2250013).
It can be written as a sum of positive squares in 3 ways, for example, as 1971216 + 278784 = 1404^2 + 528^2
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 449998 + ... + 450002.
22250000 is an apocalyptic number.
2250000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
2250000 is the 1500-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2250000
2250000 is an abundant number, since it is smaller than the sum of its proper divisors (5620993).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2250000 is an frugal number, since it uses more digits than its factorization.
2250000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 44 (or 10 counting only the distinct ones).
The product of its (nonzero) digits is 20, while the sum is 9.
The cubic root of 2250000 is about 131.0370697104.
The spelling of 2250000 in words is "two million, two hundred fifty thousand".