420312021 has 8 divisors (see below), whose sum is σ = 569603424. Its totient is φ = 275614320.

The previous prime is 420312017. The next prime is 420312031. The reversal of 420312021 is 120213024.

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

It is not a de Polignac number, because 420312021 - 2² = 420312017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420312031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148211 + ... + 1148576.

It is an arithmetic number, because the mean of its divisors is an integer number (71200428).

Almost surely, 2^420312021 is an apocalyptic number.

It is an amenable number.

420312021 is a deficient number, since it is larger than the sum of its proper divisors (149291403).

420312021 is a wasteful number, since it uses less digits than its factorization.

420312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296851.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 420312021 is about 20501.5126515094. The cubic root of 420312021 is about 749.0726440427.

Adding to 420312021 its reverse (120213024), we get a palindrome (540525045).

The spelling of 420312021 in words is "four hundred twenty million, three hundred twelve thousand, twenty-one".