420041021 has 8 divisors (see below), whose sum is σ = 429287040. Its totient is φ = 410807968.

The previous prime is 420041009. The next prime is 420041077. The reversal of 420041021 is 120140024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420041021 - 2¹⁴ = 420024637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420040987 and 420041005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420041081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93065 + ... + 97473.

It is an arithmetic number, because the mean of its divisors is an integer number (53660880).

Almost surely, 2^420041021 is an apocalyptic number.

It is an amenable number.

420041021 is a deficient number, since it is larger than the sum of its proper divisors (9246019).

420041021 is a wasteful number, since it uses less digits than its factorization.

420041021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 420041021 is about 20494.9023174057. The cubic root of 420041021 is about 748.9116189626.

Adding to 420041021 its reverse (120140024), we get a palindrome (540181045).

The spelling of 420041021 in words is "four hundred twenty million, forty-one thousand, twenty-one".