7421075321 has 48 divisors (see below), whose sum is σ = 8721820800. Its totient is φ = 6298279680.

The previous prime is 7421075273. The next prime is 7421075339. The reversal of 7421075321 is 1235701247.

It is not a de Polignac number, because 7421075321 - 2⁶ = 7421075257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7421075351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20671340 + ... + 20671698.

It is an arithmetic number, because the mean of its divisors is an integer number (181704600).

Almost surely, 2^7421075321 is an apocalyptic number.

It is an amenable number.

7421075321 is a deficient number, since it is larger than the sum of its proper divisors (1300745479).

7421075321 is a wasteful number, since it uses less digits than its factorization.

7421075321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 7421075321 is about 86145.6633905619. The cubic root of 7421075321 is about 1950.5433787916.

Adding to 7421075321 its reverse (1235701247), we get a palindrome (8656776568).

The spelling of 7421075321 in words is "seven billion, four hundred twenty-one million, seventy-five thousand, three hundred twenty-one".