421299424 has 144 divisors (see below), whose sum is σ = 1062512640. Its totient is φ = 160842240.

The previous prime is 421299419. The next prime is 421299449. The reversal of 421299424 is 424992124.

It is a super-3 number, since 3×421299424³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1173357 + ... + 1173715.

It is an arithmetic number, because the mean of its divisors is an integer number (7378560).

Almost surely, 2^421299424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421299424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531256320).

421299424 is an abundant number, since it is smaller than the sum of its proper divisors (641213216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421299424 is a wasteful number, since it uses less digits than its factorization.

421299424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 412 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 421299424 is about 20525.5797482069. The cubic root of 421299424 is about 749.6587626923.

The spelling of 421299424 in words is "four hundred twenty-one million, two hundred ninety-nine thousand, four hundred twenty-four".