2124557 has 4 divisors (see below), whose sum is σ = 2129376. Its totient is φ = 2119740.

The previous prime is 2124553. The next prime is 2124571. The reversal of 2124557 is 7554212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2124557 - 2² = 2124553 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 (2124553) 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, 1673 + ... + 2654.

It is an arithmetic number, because the mean of its divisors is an integer number (532344).

2^2124557 is an apocalyptic number.

It is an amenable number.

2124557 is a deficient number, since it is larger than the sum of its proper divisors (4819).

2124557 is an equidigital number, since it uses as much as digits as its factorization.

2124557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818.

The product of its digits is 2800, while the sum is 26.

The square root of 2124557 is about 1457.5860180449. The cubic root of 2124557 is about 128.5551449689. Note that the first 3 decimals are identical.

Adding to 2124557 its reverse (7554212), we get a palindrome (9678769).

The spelling of 2124557 in words is "two million, one hundred twenty-four thousand, five hundred fifty-seven".