420333501 has 16 divisors (see below), whose sum is σ = 641309184. Its totient is φ = 239890224.

The previous prime is 420333499. The next prime is 420333521. The reversal of 420333501 is 105333024.

It is not a de Polignac number, because 420333501 - 2¹ = 420333499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420333521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5266 + ... + 29468.

It is an arithmetic number, because the mean of its divisors is an integer number (40081824).

Almost surely, 2^420333501 is an apocalyptic number.

It is an amenable number.

420333501 is a deficient number, since it is larger than the sum of its proper divisors (220975683).

420333501 is a wasteful number, since it uses less digits than its factorization.

420333501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25040.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 420333501 is about 20502.0365086008. The cubic root of 420333501 is about 749.0854042506.

Adding to 420333501 its reverse (105333024), we get a palindrome (525666525).

The spelling of 420333501 in words is "four hundred twenty million, three hundred thirty-three thousand, five hundred one".