2431421 has 4 divisors (see below), whose sum is σ = 2453052. Its totient is φ = 2409792.

The previous prime is 2431417. The next prime is 2431433. The reversal of 2431421 is 1241342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1241342 = 2 ⋅620671.

It can be written as a sum of positive squares in 2 ways, for example, as 343396 + 2088025 = 586^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431421 - 2² = 2431417 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 2431421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431441) 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, 10646 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (613263).

2^2431421 is an apocalyptic number.

It is an amenable number.

2431421 is a deficient number, since it is larger than the sum of its proper divisors (21631).

2431421 is a wasteful number, since it uses less digits than its factorization.

2431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21630.

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

The square root of 2431421 is about 1559.3014461611. The cubic root of 2431421 is about 134.4683433648.

Adding to 2431421 its reverse (1241342), we get a palindrome (3672763).

The spelling of 2431421 in words is "two million, four hundred thirty-one thousand, four hundred twenty-one".