421421801 has 16 divisors (see below), whose sum is σ = 451355520. Its totient is φ = 392515200.

The previous prime is 421421783. The next prime is 421421807. The reversal of 421421801 is 108124124.

It is a cyclic number.

It is not a de Polignac number, because 421421801 - 2¹⁰ = 421420777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (421421807) 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, 594035 + ... + 594743.

It is an arithmetic number, because the mean of its divisors is an integer number (28209720).

Almost surely, 2^421421801 is an apocalyptic number.

It is an amenable number.

421421801 is a deficient number, since it is larger than the sum of its proper divisors (29933719).

421421801 is a wasteful number, since it uses less digits than its factorization.

421421801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 421421801 is about 20528.5606168577. The cubic root of 421421801 is about 749.7313414045.

Adding to 421421801 its reverse (108124124), we get a palindrome (529545925).

The spelling of 421421801 in words is "four hundred twenty-one million, four hundred twenty-one thousand, eight hundred one".