2130421 has 4 divisors (see below), whose sum is σ = 2223072. Its totient is φ = 2037772.

The previous prime is 2130391. The next prime is 2130437. The reversal of 2130421 is 1240312.

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.

It is a cyclic number.

It is not a de Polignac number, because 2130421 - 2¹⁵ = 2097653 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 3⁵ + 0 + 4⁴ + 2²¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130461) 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, 46291 + ... + 46336.

It is an arithmetic number, because the mean of its divisors is an integer number (555768).

2^2130421 is an apocalyptic number.

It is an amenable number.

2130421 is a deficient number, since it is larger than the sum of its proper divisors (92651).

2130421 is an equidigital number, since it uses as much as digits as its factorization.

2130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92650.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2130421 is about 1459.5961770298. The cubic root of 2130421 is about 128.6733115429.

Adding to 2130421 its reverse (1240312), we get a palindrome (3370733).

The spelling of 2130421 in words is "two million, one hundred thirty thousand, four hundred twenty-one".