421243100 has 18 divisors (see below), whose sum is σ = 914097744. Its totient is φ = 168497200.

The previous prime is 421243073. The next prime is 421243103. The reversal of 421243100 is 1342124.

It is a super-2 number, since 2×421243100² = 354891498595220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421243103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2106116 + ... + 2106315.

It is an arithmetic number, because the mean of its divisors is an integer number (50783208).

Almost surely, 2^421243100 is an apocalyptic number.

It is an amenable number.

421243100 is an abundant number, since it is smaller than the sum of its proper divisors (492854644).

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

421243100 is a wasteful number, since it uses less digits than its factorization.

421243100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212445 (or 4212438 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 421243100 is about 20524.2076582751. The cubic root of 421243100 is about 749.6253536254.

Adding to 421243100 its reverse (1342124), we get a palindrome (422585224).

The spelling of 421243100 in words is "four hundred twenty-one million, two hundred forty-three thousand, one hundred".