2142225 has 18 divisors (see below), whose sum is σ = 3837366. Its totient is φ = 1142400.

The previous prime is 2142211. The next prime is 2142227. The reversal of 2142225 is 5222412.

It can be written as a sum of positive squares in 3 ways, for example, as 103041 + 2039184 = 321^2 + 1428^2 .

It is not a de Polignac number, because 2142225 - 2⁷ = 2142097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2142198 and 2142207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4536 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (213187).

2^2142225 is an apocalyptic number.

2142225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2142225 is a deficient number, since it is larger than the sum of its proper divisors (1695141).

2142225 is a wasteful number, since it uses less digits than its factorization.

2142225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537 (or 9529 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 2142225 is about 1463.6341756054. The cubic root of 2142225 is about 128.9105202442.

Adding to 2142225 its reverse (5222412), we get a palindrome (7364637).

The spelling of 2142225 in words is "two million, one hundred forty-two thousand, two hundred twenty-five".