1663125 has 20 divisors (see below), whose sum is σ = 2774112. Its totient is φ = 886000.

The previous prime is 1663117. The next prime is 1663133. The reversal of 1663125 is 5213661.

It is an interprime number because it is at equal distance from previous prime (1663117) and next prime (1663133).

It is not a de Polignac number, because 1663125 - 2³ = 1663117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663095 and 1663104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1432 + ... + 2318.

2^1663125 is an apocalyptic number.

1663125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1663125 is a deficient number, since it is larger than the sum of its proper divisors (1110987).

1663125 is an frugal number, since it uses more digits than its factorization.

1663125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 895 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1663125 is about 1289.6220376529. The cubic root of 1663125 is about 118.4790683889.

Adding to 1663125 its reverse (5213661), we get a palindrome (6876786).

The spelling of 1663125 in words is "one million, six hundred sixty-three thousand, one hundred twenty-five".