421541128427 has 16 divisors (see below), whose sum is σ = 466330202112. Its totient is φ = 379660232160.

The previous prime is 421541128367. The next prime is 421541128469. The reversal of 421541128427 is 724821145124.

It is a cyclic number.

It is not a de Polignac number, because 421541128427 - 2³⁴ = 404361259243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421541128487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7963103 + ... + 8015864.

It is an arithmetic number, because the mean of its divisors is an integer number (29145637632).

Almost surely, 2^421541128427 is an apocalyptic number.

421541128427 is a deficient number, since it is larger than the sum of its proper divisors (44789073685).

421541128427 is a wasteful number, since it uses less digits than its factorization.

421541128427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15979058.

The product of its digits is 143360, while the sum is 41.

The spelling of 421541128427 in words is "four hundred twenty-one billion, five hundred forty-one million, one hundred twenty-eight thousand, four hundred twenty-seven".