1648745 has 24 divisors (see below), whose sum is σ = 2416704. Its totient is φ = 1057536.

The previous prime is 1648739. The next prime is 1648753. The reversal of 1648745 is 5478461.

It is not a de Polignac number, because 1648745 - 2²⁰ = 600169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

Its product of digits (26880) is a multiple of the sum of its prime divisors (192).

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, 10034 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (100696).

2^1648745 is an apocalyptic number.

It is an amenable number.

1648745 is a deficient number, since it is larger than the sum of its proper divisors (767959).

1648745 is a wasteful number, since it uses less digits than its factorization.

1648745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 192 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 1648745 is about 1284.0346568532. The cubic root of 1648745 is about 118.1366080434.

The spelling of 1648745 in words is "one million, six hundred forty-eight thousand, seven hundred forty-five".