1021825 has 12 divisors (see below), whose sum is σ = 1448320. Its totient is φ = 700560.

The previous prime is 1021807. The next prime is 1021831. The reversal of 1021825 is 5281201.

It is not a de Polignac number, because 1021825 - 2⁵ = 1021793 is a prime.

It is an Ulam number.

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 11 ways as a sum of consecutive naturals, for example, 2745 + ... + 3094.

2^1021825 is an apocalyptic number.

It is an amenable number.

1021825 is a deficient number, since it is larger than the sum of its proper divisors (426495).

1021825 is an equidigital number, since it uses as much as digits as its factorization.

1021825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856 (or 5851 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1021825 is about 1010.8535996869. The cubic root of 1021825 is about 100.7222706908.

The spelling of 1021825 in words is "one million, twenty-one thousand, eight hundred twenty-five".