2121250 has 20 divisors (see below), whose sum is σ = 3978414. Its totient is φ = 848000.

The previous prime is 2121241. The next prime is 2121253. The reversal of 2121250 is 521212.

It can be written as a sum of positive squares in 5 ways, for example, as 328329 + 1792921 = 573^2 + 1339^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2121250.

It is not an unprimeable number, because it can be changed into a prime (2121253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 402 + ... + 2098.

2^2121250 is an apocalyptic number.

2121250 is a deficient number, since it is larger than the sum of its proper divisors (1857164).

2121250 is an equidigital number, since it uses as much as digits as its factorization.

2121250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2121250 is about 1456.4511663630. The cubic root of 2121250 is about 128.4884090743.

Adding to 2121250 its reverse (521212), we get a palindrome (2642462).

The spelling of 2121250 in words is "two million, one hundred twenty-one thousand, two hundred fifty".