1628625 has 32 divisors (see below), whose sum is σ = 2800512. Its totient is φ = 840000.

The previous prime is 1628621. The next prime is 1628633. The reversal of 1628625 is 5268261.

It is not a de Polignac number, because 1628625 - 2² = 1628621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1628592 and 1628601.

It is not an unprimeable number, because it can be changed into a prime (1628621) 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 31 ways as a sum of consecutive naturals, for example, 16075 + ... + 16175.

It is an arithmetic number, because the mean of its divisors is an integer number (87516).

2^1628625 is an apocalyptic number.

1628625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1628625 is a deficient number, since it is larger than the sum of its proper divisors (1171887).

1628625 is a wasteful number, since it uses less digits than its factorization.

1628625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 152 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 1628625 is about 1276.1759283108. The cubic root of 1628625 is about 117.6540908787.

The spelling of 1628625 in words is "one million, six hundred twenty-eight thousand, six hundred twenty-five".