2129578 has 8 divisors (see below), whose sum is σ = 3484800. Its totient is φ = 967980.

The previous prime is 2129551. The next prime is 2129579. The reversal of 2129578 is 8759212.

2129578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a d-powerful number, because it can be written as 2¹⁴ + 1 + 2²¹ + 9 + 5⁶ + 7³ + 8² .

It is not an unprimeable number, because it can be changed into a prime (2129579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48378 + ... + 48421.

It is an arithmetic number, because the mean of its divisors is an integer number (435600).

2^2129578 is an apocalyptic number.

2129578 is a deficient number, since it is larger than the sum of its proper divisors (1355222).

2129578 is a wasteful number, since it uses less digits than its factorization.

2129578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96812.

The product of its digits is 10080, while the sum is 34.

The square root of 2129578 is about 1459.3073699533. The cubic root of 2129578 is about 128.6563374468.

The spelling of 2129578 in words is "two million, one hundred twenty-nine thousand, five hundred seventy-eight".