2124861 has 4 divisors (see below), whose sum is σ = 2833152. Its totient is φ = 1416572.

The previous prime is 2124853. The next prime is 2124869. The reversal of 2124861 is 1684212.

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 an interprime number because it is at equal distance from previous prime (2124853) and next prime (2124869).

It is a cyclic number.

It is not a de Polignac number, because 2124861 - 2³ = 2124853 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124869) 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, 354141 + ... + 354146.

It is an arithmetic number, because the mean of its divisors is an integer number (708288).

2^2124861 is an apocalyptic number.

It is an amenable number.

2124861 is a deficient number, since it is larger than the sum of its proper divisors (708291).

2124861 is an equidigital number, since it uses as much as digits as its factorization.

2124861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708290.

The product of its digits is 768, while the sum is 24.

The square root of 2124861 is about 1457.6902963250. The cubic root of 2124861 is about 128.5612762707.

The spelling of 2124861 in words is "two million, one hundred twenty-four thousand, eight hundred sixty-one".