7421507328421 has 8 divisors (see below), whose sum is σ = 8025259489920. Its totient is φ = 6836332156608.

The previous prime is 7421507328407. The next prime is 7421507328437. The reversal of 7421507328421 is 1248237051247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7421507328421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421507328721) 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, 4644246591 + ... + 4644248188.

It is an arithmetic number, because the mean of its divisors is an integer number (1003157436240).

Almost surely, 2^{7421507328421} is an apocalyptic number.

It is an amenable number.

7421507328421 is a deficient number, since it is larger than the sum of its proper divisors (603752161499).

7421507328421 is a wasteful number, since it uses less digits than its factorization.

7421507328421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9288494843.

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 7421507328421 in words is "seven trillion, four hundred twenty-one billion, five hundred seven million, three hundred twenty-eight thousand, four hundred twenty-one".