421066401 has 32 divisors (see below), whose sum is σ = 663571200. Its totient is φ = 232471296.

The previous prime is 421066381. The next prime is 421066403. The reversal of 421066401 is 104660124.

It is not a de Polignac number, because 421066401 - 2¹⁸ = 420804257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421066403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113955 + ... + 117591.

It is an arithmetic number, because the mean of its divisors is an integer number (20736600).

Almost surely, 2^421066401 is an apocalyptic number.

It is an amenable number.

421066401 is a deficient number, since it is larger than the sum of its proper divisors (242504799).

421066401 is a wasteful number, since it uses less digits than its factorization.

421066401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 421066401 is about 20519.9025582482. The cubic root of 421066401 is about 749.5205237576.

The spelling of 421066401 in words is "four hundred twenty-one million, sixty-six thousand, four hundred one".