7424320421 has 8 divisors (see below), whose sum is σ = 8777521920. Its totient is φ = 6144265008.

The previous prime is 7424320399. The next prime is 7424320441. The reversal of 7424320421 is 1240234247.

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

It is not a de Polignac number, because 7424320421 - 2¹⁸ = 7424058277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7424320441) 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, 18286301 + ... + 18286706.

It is an arithmetic number, because the mean of its divisors is an integer number (1097190240).

Almost surely, 2^7424320421 is an apocalyptic number.

It is an amenable number.

7424320421 is a deficient number, since it is larger than the sum of its proper divisors (1353201499).

7424320421 is a wasteful number, since it uses less digits than its factorization.

7424320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36573043.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 7424320421 is about 86164.4962905256. The cubic root of 7424320421 is about 1950.8276496305.

Adding to 7424320421 its reverse (1240234247), we get a palindrome (8664554668).

The spelling of 7424320421 in words is "seven billion, four hundred twenty-four million, three hundred twenty thousand, four hundred twenty-one".