420201421 has 16 divisors (see below), whose sum is σ = 446828544. Its totient is φ = 394322544.

The previous prime is 420201409. The next prime is 420201433. The reversal of 420201421 is 124102024.

It is an interprime number because it is at equal distance from previous prime (420201409) and next prime (420201433).

It is a cyclic number.

It is not a de Polignac number, because 420201421 - 2⁵ = 420201389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420201395 and 420201404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420201401) 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, 565176 + ... + 565918.

It is an arithmetic number, because the mean of its divisors is an integer number (27926784).

Almost surely, 2^420201421 is an apocalyptic number.

It is an amenable number.

420201421 is a deficient number, since it is larger than the sum of its proper divisors (26627123).

420201421 is a wasteful number, since it uses less digits than its factorization.

420201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 420201421 is about 20498.8151120986. The cubic root of 420201421 is about 749.0069351581.

Adding to 420201421 its reverse (124102024), we get a palindrome (544303445).

The spelling of 420201421 in words is "four hundred twenty million, two hundred one thousand, four hundred twenty-one".