421020351 has 24 divisors (see below), whose sum is σ = 647552880. Its totient is φ = 262676736.

The previous prime is 421020337. The next prime is 421020389. The reversal of 421020351 is 153020124.

It is not a de Polignac number, because 421020351 - 2⁹ = 421019839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421021351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19701 + ... + 35073.

It is an arithmetic number, because the mean of its divisors is an integer number (26981370).

Almost surely, 2^421020351 is an apocalyptic number.

421020351 is a deficient number, since it is larger than the sum of its proper divisors (226532529).

421020351 is a wasteful number, since it uses less digits than its factorization.

421020351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15575 (or 15572 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 421020351 is about 20518.7804462156. The cubic root of 421020351 is about 749.4931989474.

Adding to 421020351 its reverse (153020124), we get a palindrome (574040475).

The spelling of 421020351 in words is "four hundred twenty-one million, twenty thousand, three hundred fifty-one".