420503421 has 32 divisors (see below), whose sum is σ = 651127680. Its totient is φ = 239155200.

The previous prime is 420503417. The next prime is 420503453. The reversal of 420503421 is 124305024.

It is not a de Polignac number, because 420503421 - 2² = 420503417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420503401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23461 + ... + 37301.

It is an arithmetic number, because the mean of its divisors is an integer number (20347740).

Almost surely, 2^420503421 is an apocalyptic number.

420503421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

420503421 is a deficient number, since it is larger than the sum of its proper divisors (230624259).

420503421 is a wasteful number, since it uses less digits than its factorization.

420503421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13917.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 420503421 is about 20506.1800684574. The cubic root of 420503421 is about 749.1863300186.

Adding to 420503421 its reverse (124305024), we get a palindrome (544808445).

The spelling of 420503421 in words is "four hundred twenty million, five hundred three thousand, four hundred twenty-one".