2121423 has 8 divisors (see below), whose sum is σ = 2919936. Its totient is φ = 1368600.

The previous prime is 2121403. The next prime is 2121433. The reversal of 2121423 is 3241212.

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

It is not a de Polignac number, because 2121423 - 2⁸ = 2121167 is a prime.

2121423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121403) 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, 11313 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (364992).

2^2121423 is an apocalyptic number.

2121423 is a deficient number, since it is larger than the sum of its proper divisors (798513).

2121423 is a wasteful number, since it uses less digits than its factorization.

2121423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22845.

The product of its digits is 96, while the sum is 15.

The square root of 2121423 is about 1456.5105560895. The cubic root of 2121423 is about 128.4919019661.

Adding to 2121423 its reverse (3241212), we get a palindrome (5362635).

The spelling of 2121423 in words is "two million, one hundred twenty-one thousand, four hundred twenty-three".