1875021 has 4 divisors (see below), whose sum is σ = 2500032. Its totient is φ = 1250012.

The previous prime is 1875011. The next prime is 1875037. The reversal of 1875021 is 1205781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1875021 - 2⁷ = 1874893 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1874982 and 1875000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1875011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 312501 + ... + 312506.

It is an arithmetic number, because the mean of its divisors is an integer number (625008).

2^1875021 is an apocalyptic number.

It is an amenable number.

1875021 is a deficient number, since it is larger than the sum of its proper divisors (625011).

1875021 is an equidigital number, since it uses as much as digits as its factorization.

1875021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625010.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1875021 is about 1369.3140618572. The cubic root of 1875021 is about 123.3110640744.

The spelling of 1875021 in words is "one million, eight hundred seventy-five thousand, twenty-one".