1663245 has 24 divisors (see below), whose sum is σ = 3010176. Its totient is φ = 847968.

The previous prime is 1663223. The next prime is 1663267. The reversal of 1663245 is 5423661.

It is an interprime number because it is at equal distance from previous prime (1663223) and next prime (1663267).

It is not a de Polignac number, because 1663245 - 2⁷ = 1663117 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 1 + 6² + 6³ + 3¹³ + 2³ + 4⁸ + 5⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232 + ... + 1838.

It is an arithmetic number, because the mean of its divisors is an integer number (125424).

2^1663245 is an apocalyptic number.

1663245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1663245 is a deficient number, since it is larger than the sum of its proper divisors (1346931).

1663245 is a wasteful number, since it uses less digits than its factorization.

1663245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1638 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1663245 is about 1289.6685620732. The cubic root of 1663245 is about 118.4819178733.

The spelling of 1663245 in words is "one million, six hundred sixty-three thousand, two hundred forty-five".