2321421 has 8 divisors (see below), whose sum is σ = 3202080. Its totient is φ = 1494192.

The previous prime is 2321399. The next prime is 2321443. The reversal of 2321421 is 1241232.

It is an interprime number because it is at equal distance from previous prime (2321399) and next prime (2321443).

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

It is not a de Polignac number, because 2321421 - 2⁶ = 2321357 is a prime.

It is an Ulam 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 2321421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321821) 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, 13255 + ... + 13428.

It is an arithmetic number, because the mean of its divisors is an integer number (400260).

2^2321421 is an apocalyptic number.

It is an amenable number.

2321421 is a deficient number, since it is larger than the sum of its proper divisors (880659).

2321421 is a wasteful number, since it uses less digits than its factorization.

2321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26715.

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

The square root of 2321421 is about 1523.6210158698. The cubic root of 2321421 is about 132.4091414601.

Adding to 2321421 its reverse (1241232), we get a palindrome (3562653).

It can be divided in two parts, 232 and 1421, that added together give a triangular number (1653 = T₅₇).

The spelling of 2321421 in words is "two million, three hundred twenty-one thousand, four hundred twenty-one".