2124578 has 8 divisors (see below), whose sum is σ = 3205020. Its totient is φ = 1056240.

The previous prime is 2124571. The next prime is 2124589. The reversal of 2124578 is 8754212.

It can be written as a sum of positive squares in 2 ways, for example, as 1495729 + 628849 = 1223^2 + 793^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2124578.

It is not an unprimeable number, because it can be changed into a prime (2124571) 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, 2573 + ... + 3296.

2^2124578 is an apocalyptic number.

2124578 is a deficient number, since it is larger than the sum of its proper divisors (1080442).

2124578 is a wasteful number, since it uses less digits than its factorization.

2124578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052.

The product of its digits is 4480, while the sum is 29.

The square root of 2124578 is about 1457.5932217186. The cubic root of 2124578 is about 128.5555685316. Note that the first 4 decimals are identical.

It can be divided in two parts, 21245 and 78, that multiplied together give a triangular number (1657110 = T₁₈₂₀).

The spelling of 2124578 in words is "two million, one hundred twenty-four thousand, five hundred seventy-eight".