421220413 has 8 divisors (see below), whose sum is σ = 442892736. Its totient is φ = 399828000.

The previous prime is 421220383. The next prime is 421220417. The reversal of 421220413 is 314022124.

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-421220413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421220417) 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, 66888 + ... + 72913.

It is an arithmetic number, because the mean of its divisors is an integer number (55361592).

Almost surely, 2^421220413 is an apocalyptic number.

It is an amenable number.

421220413 is a deficient number, since it is larger than the sum of its proper divisors (21672323).

421220413 is a wasteful number, since it uses less digits than its factorization.

421220413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139955.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421220413 is about 20523.6549620188. The cubic root of 421220413 is about 749.6118957941.

Adding to 421220413 its reverse (314022124), we get a palindrome (735242537).

The spelling of 421220413 in words is "four hundred twenty-one million, two hundred twenty thousand, four hundred thirteen".