2150000 has 60 divisors (see below), whose sum is σ = 5327784. Its totient is φ = 840000.

The previous prime is 2149993. The next prime is 2150009. The reversal of 2150000 is 512.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2150000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49979 + ... + 50021.

2^2150000 is an apocalyptic number.

2150000 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 2150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663892).

2150000 is an abundant number, since it is smaller than the sum of its proper divisors (3177784).

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

2150000 is an frugal number, since it uses more digits than its factorization.

2150000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 2150000 is about 1466.2878298615. The cubic root of 2150000 is about 129.0662880674.

Adding to 2150000 its reverse (512), we get a palindrome (2150512).

The spelling of 2150000 in words is "two million, one hundred fifty thousand".