2129847 has 8 divisors (see below), whose sum is σ = 2937840. Its totient is φ = 1370880.

The previous prime is 2129837. The next prime is 2129849. The reversal of 2129847 is 7489212.

It is a happy number.

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

It is not a de Polignac number, because 2129847 - 2⁶ = 2129783 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12154 + ... + 12327.

It is an arithmetic number, because the mean of its divisors is an integer number (367230).

2^2129847 is an apocalyptic number.

2129847 is a deficient number, since it is larger than the sum of its proper divisors (807993).

2129847 is a wasteful number, since it uses less digits than its factorization.

2129847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24513.

The product of its digits is 8064, while the sum is 33.

The square root of 2129847 is about 1459.3995340550. The cubic root of 2129847 is about 128.6617543413.

The spelling of 2129847 in words is "two million, one hundred twenty-nine thousand, eight hundred forty-seven".