7421875 has 18 divisors (see below), whose sum is σ = 9765620. Its totient is φ = 5625000.

The previous prime is 7421863. The next prime is 7421891. The reversal of 7421875 is 5781247.

It is a happy number.

It is not a de Polignac number, because 7421875 - 2⁹ = 7421363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7421875.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 390616 + ... + 390634.

Almost surely, 2^7421875 is an apocalyptic number.

7421875 is a deficient number, since it is larger than the sum of its proper divisors (2343745).

7421875 is an frugal number, since it uses more digits than its factorization.

7421875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 24 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 7421875 is about 2724.3118397129. The cubic root of 7421875 is about 195.0613438385.

The spelling of 7421875 in words is "seven million, four hundred twenty-one thousand, eight hundred seventy-five".