420621105 has 8 divisors (see below), whose sum is σ = 672993792. Its totient is φ = 224331248.

The previous prime is 420621101. The next prime is 420621127. The reversal of 420621105 is 501126024.

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 420621105 - 2² = 420621101 is a prime.

It is a super-2 number, since 2×420621105² = 353844227942842050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420621101) 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, 14020689 + ... + 14020718.

It is an arithmetic number, because the mean of its divisors is an integer number (84124224).

Almost surely, 2^420621105 is an apocalyptic number.

It is an amenable number.

420621105 is a deficient number, since it is larger than the sum of its proper divisors (252372687).

420621105 is a wasteful number, since it uses less digits than its factorization.

420621105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28041415.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 420621105 is about 20509.0493441310. The cubic root of 420621105 is about 749.2562137309.

Adding to 420621105 its reverse (501126024), we get a palindrome (921747129).

The spelling of 420621105 in words is "four hundred twenty million, six hundred twenty-one thousand, one hundred five".