421270100 has 18 divisors (see below), whose sum is σ = 914156334. Its totient is φ = 168508000.

The previous prime is 421270099. The next prime is 421270133. The reversal of 421270100 is 1072124.

It can be written as a sum of positive squares in 3 ways, for example, as 132066064 + 289204036 = 11492^2 + 17006^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2106251 + ... + 2106450.

It is an arithmetic number, because the mean of its divisors is an integer number (50786463).

Almost surely, 2^421270100 is an apocalyptic number.

It is an amenable number.

421270100 is an abundant number, since it is smaller than the sum of its proper divisors (492886234).

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

421270100 is a wasteful number, since it uses less digits than its factorization.

421270100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212715 (or 4212708 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 421270100 is about 20524.8654075977. The cubic root of 421270100 is about 749.6413692801.

The spelling of 421270100 in words is "four hundred twenty-one million, two hundred seventy thousand, one hundred".