2124455 has 4 divisors (see below), whose sum is σ = 2549352. Its totient is φ = 1699560.

The previous prime is 2124449. The next prime is 2124457. The reversal of 2124455 is 5544212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2124455 - 2¹⁶ = 2058919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2124455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212441 + ... + 212450.

It is an arithmetic number, because the mean of its divisors is an integer number (637338).

2^2124455 is an apocalyptic number.

2124455 is a deficient number, since it is larger than the sum of its proper divisors (424897).

2124455 is an equidigital number, since it uses as much as digits as its factorization.

2124455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424896.

The product of its digits is 1600, while the sum is 23.

The square root of 2124455 is about 1457.5510282662. The cubic root of 2124455 is about 128.5530876248.

Adding to 2124455 its reverse (5544212), we get a palindrome (7668667).

The spelling of 2124455 in words is "two million, one hundred twenty-four thousand, four hundred fifty-five".