2134421 has 4 divisors (see below), whose sum is σ = 2137344. Its totient is φ = 2131500.

The previous prime is 2134417. The next prime is 2134439. The reversal of 2134421 is 1244312.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2134421 - 2² = 2134417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2134421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2134471) 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, 716 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (534336).

2^2134421 is an apocalyptic number.

It is an amenable number.

2134421 is a deficient number, since it is larger than the sum of its proper divisors (2923).

2134421 is a wasteful number, since it uses less digits than its factorization.

2134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922.

The product of its digits is 192, while the sum is 17.

The square root of 2134421 is about 1460.9657764643. The cubic root of 2134421 is about 128.7537919517.

Adding to 2134421 its reverse (1244312), we get a palindrome (3378733).

The spelling of 2134421 in words is "two million, one hundred thirty-four thousand, four hundred twenty-one".