2134821 has 32 divisors (see below), whose sum is σ = 3351040. Its totient is φ = 1197504.

The previous prime is 2134813. The next prime is 2134831. The reversal of 2134821 is 1284312.

It is not a de Polignac number, because 2134821 - 2³ = 2134813 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 (2134801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31830 + ... + 31896.

It is an arithmetic number, because the mean of its divisors is an integer number (104720).

2^2134821 is an apocalyptic number.

It is an amenable number.

2134821 is a deficient number, since it is larger than the sum of its proper divisors (1216219).

2134821 is a wasteful number, since it uses less digits than its factorization.

2134821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145.

The product of its digits is 384, while the sum is 21.

The square root of 2134821 is about 1461.1026657973. The cubic root of 2134821 is about 128.7618344606.

The spelling of 2134821 in words is "two million, one hundred thirty-four thousand, eight hundred twenty-one".