403243421 has 8 divisors (see below), whose sum is σ = 461000064. Its totient is φ = 345524400.

The previous prime is 403243387. The next prime is 403243433. The reversal of 403243421 is 124342304.

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

It is a cyclic number.

It is not a de Polignac number, because 403243421 - 2¹⁴ = 403227037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403243921) 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, 19496 + ... + 34446.

It is an arithmetic number, because the mean of its divisors is an integer number (57625008).

Almost surely, 2^403243421 is an apocalyptic number.

It is an amenable number.

403243421 is a deficient number, since it is larger than the sum of its proper divisors (57756643).

403243421 is a wasteful number, since it uses less digits than its factorization.

403243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18811.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 403243421 is about 20080.9218164904. The cubic root of 403243421 is about 738.7924186999.

Adding to 403243421 its reverse (124342304), we get a palindrome (527585725).

The spelling of 403243421 in words is "four hundred three million, two hundred forty-three thousand, four hundred twenty-one".