2121325 has 12 divisors (see below), whose sum is σ = 2681748. Its totient is φ = 1664000.

The previous prime is 2121323. The next prime is 2121337. The reversal of 2121325 is 5231212.

2121325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 236196 + 1885129 = 486^2 + 1373^2 .

It is not a de Polignac number, because 2121325 - 2¹ = 2121323 is a prime.

It is an Ulam number.

It is a Duffinian number.

2121325 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2121299 and 2121308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (223479).

2^2121325 is an apocalyptic number.

2121325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121325 is a deficient number, since it is larger than the sum of its proper divisors (560423).

2121325 is a wasteful number, since it uses less digits than its factorization.

2121325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1659 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 2121325 is about 1456.4769136516. The cubic root of 2121325 is about 128.4899233571.

Adding to 2121325 its reverse (5231212), we get a palindrome (7352537).

It can be divided in two parts, 212 and 1325, that multiplied together give a square (280900 = 530²).

The spelling of 2121325 in words is "two million, one hundred twenty-one thousand, three hundred twenty-five".