2122445 has 8 divisors (see below), whose sum is σ = 2742936. Its totient is φ = 1567296.

The previous prime is 2122441. The next prime is 2122451. The reversal of 2122445 is 5442212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 2111209 = 106^2 + 1453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2122445 - 2² = 2122441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16262 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (342867).

2^2122445 is an apocalyptic number.

It is an amenable number.

2122445 is a deficient number, since it is larger than the sum of its proper divisors (620491).

2122445 is a wasteful number, since it uses less digits than its factorization.

2122445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32671.

The product of its digits is 640, while the sum is 20.

The square root of 2122445 is about 1456.8613523599. The cubic root of 2122445 is about 128.5125324017.

Adding to 2122445 its reverse (5442212), we get a palindrome (7564657).

The spelling of 2122445 in words is "two million, one hundred twenty-two thousand, four hundred forty-five".