420621102 has 48 divisors (see below), whose sum is σ = 1037432448. Its totient is φ = 121917840.

The previous prime is 420621101. The next prime is 420621127. The reversal of 420621102 is 201126024.

420621102 is a `hidden beast` number, since 42 + 0 + 621 + 1 + 0 + 2 = 666.

It is a super-2 number, since 2×420621102² = 353844222895388808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420621101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41628 + ... + 50735.

It is an arithmetic number, because the mean of its divisors is an integer number (21613176).

Almost surely, 2^420621102 is an apocalyptic number.

420621102 is an abundant number, since it is smaller than the sum of its proper divisors (616811346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420621102 is a wasteful number, since it uses less digits than its factorization.

420621102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92405 (or 92402 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420621102 is about 20509.0492709925. The cubic root of 420621102 is about 749.2562119496.

Adding to 420621102 its reverse (201126024), we get a palindrome (621747126).

The spelling of 420621102 in words is "four hundred twenty million, six hundred twenty-one thousand, one hundred two".