2101250 has 30 divisors (see below), whose sum is σ = 4036989. Its totient is φ = 820000.

The previous prime is 2101249. The next prime is 2101259. The reversal of 2101250 is 521012.

It can be written as a sum of positive squares in 8 ways, for example, as 1181569 + 919681 = 1087^2 + 959^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1025.

It is an Ulam number.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 51230 + ... + 51270.

2^2101250 is an apocalyptic number.

2101250 is a deficient number, since it is larger than the sum of its proper divisors (1935739).

2101250 is an frugal number, since it uses more digits than its factorization.

2101250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2101250 is about 1449.5689014324. The cubic root of 2101250 is about 128.0833197758.

Adding to 2101250 its reverse (521012), we get a palindrome (2622262).

It can be divided in two parts, 2 and 101250, that multiplied together give a square (202500 = 450²).

The spelling of 2101250 in words is "two million, one hundred one thousand, two hundred fifty".