1020625 has 20 divisors (see below), whose sum is σ = 1349568. Its totient is φ = 770000.

The previous prime is 1020619. The next prime is 1020631. The reversal of 1020625 is 5260201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020619) and next prime (1020631).

It is not a de Polignac number, because 1020625 - 2⁹ = 1020113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020599 and 1020608.

It is a congruent 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 19 ways as a sum of consecutive naturals, for example, 14340 + ... + 14410.

2^1020625 is an apocalyptic number.

It is an amenable number.

1020625 is a deficient number, since it is larger than the sum of its proper divisors (328943).

1020625 is an frugal number, since it uses more digits than its factorization.

1020625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1020625 is about 1010.2598675588. The cubic root of 1020625 is about 100.6828268624.

Adding to 1020625 its reverse (5260201), we get a palindrome (6280826).

The spelling of 1020625 in words is "one million, twenty thousand, six hundred twenty-five".