421935128 has 16 divisors (see below), whose sum is σ = 832767000. Its totient is φ = 199863936.

The previous prime is 421935127. The next prime is 421935131. The reversal of 421935128 is 821539124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421935127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1387793 + ... + 1388096.

Almost surely, 2^421935128 is an apocalyptic number.

It is an amenable number.

421935128 is a deficient number, since it is larger than the sum of its proper divisors (410831872).

421935128 is a wasteful number, since it uses less digits than its factorization.

421935128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775914 (or 2775910 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 421935128 is about 20541.0595637129. The cubic root of 421935128 is about 750.0356297147.

The spelling of 421935128 in words is "four hundred twenty-one million, nine hundred thirty-five thousand, one hundred twenty-eight".