7919421 has 8 divisors (see below), whose sum is σ = 10620960. Its totient is φ = 5248752.

The previous prime is 7919413. The next prime is 7919449. The reversal of 7919421 is 1249197.

7919421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7919421 - 2³ = 7919413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7919491) 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, 7111 + ... + 8148.

It is an arithmetic number, because the mean of its divisors is an integer number (1327620).

Almost surely, 2^7919421 is an apocalyptic number.

It is an amenable number.

7919421 is a deficient number, since it is larger than the sum of its proper divisors (2701539).

7919421 is a wasteful number, since it uses less digits than its factorization.

7919421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435.

The product of its digits is 4536, while the sum is 33.

The square root of 7919421 is about 2814.1465846683. The cubic root of 7919421 is about 199.3262411270.

The spelling of 7919421 in words is "seven million, nine hundred nineteen thousand, four hundred twenty-one".