421330403 has 8 divisors (see below), whose sum is σ = 454521648. Its totient is φ = 388250784.

The previous prime is 421330319. The next prime is 421330411. The reversal of 421330403 is 304033124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421330403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421300403) 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, 19976 + ... + 35237.

It is an arithmetic number, because the mean of its divisors is an integer number (56815206).

Almost surely, 2^421330403 is an apocalyptic number.

421330403 is a deficient number, since it is larger than the sum of its proper divisors (33191245).

421330403 is a wasteful number, since it uses less digits than its factorization.

421330403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55813.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 421330403 is about 20526.3343780618. The cubic root of 421330403 is about 749.6771368843.

Adding to 421330403 its reverse (304033124), we get a palindrome (725363527).

The spelling of 421330403 in words is "four hundred twenty-one million, three hundred thirty thousand, four hundred three".