421321413 has 4 divisors (see below), whose sum is σ = 561761888. Its totient is φ = 280880940.

The previous prime is 421321391. The next prime is 421321451. The reversal of 421321413 is 314123124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421321413 - 2⁹ = 421320901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421321413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421321463) 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, 70220233 + ... + 70220238.

It is an arithmetic number, because the mean of its divisors is an integer number (140440472).

Almost surely, 2^421321413 is an apocalyptic number.

It is an amenable number.

421321413 is a deficient number, since it is larger than the sum of its proper divisors (140440475).

421321413 is a wasteful number, since it uses less digits than its factorization.

421321413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140440474.

The product of its digits is 576, while the sum is 21.

The square root of 421321413 is about 20526.1153899124. The cubic root of 421321413 is about 749.6718048493.

Adding to 421321413 its reverse (314123124), we get a palindrome (735444537).

The spelling of 421321413 in words is "four hundred twenty-one million, three hundred twenty-one thousand, four hundred thirteen".