1421875 has 28 divisors (see below), whose sum is σ = 2187472. Its totient is φ = 900000.

The previous prime is 1421867. The next prime is 1421909. The reversal of 1421875 is 5781241.

It is not a de Polignac number, because 1421875 - 2³ = 1421867 is a prime.

It is a nialpdrome in base 5.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 109369 + ... + 109381.

It is an arithmetic number, because the mean of its divisors is an integer number (78124).

2^1421875 is an apocalyptic number.

1421875 is a deficient number, since it is larger than the sum of its proper divisors (765597).

1421875 is an frugal number, since it uses more digits than its factorization.

1421875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50 (or 25 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 1421875 is about 1192.4240017712. The cubic root of 1421875 is about 112.4485361319.

The spelling of 1421875 in words is "one million, four hundred twenty-one thousand, eight hundred seventy-five".