1648521 has 24 divisors (see below), whose sum is σ = 2755584. Its totient is φ = 930240.

The previous prime is 1648513. The next prime is 1648523. The reversal of 1648521 is 1258461.

It is not a de Polignac number, because 1648521 - 2³ = 1648513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8536 + ... + 8726.

It is an arithmetic number, because the mean of its divisors is an integer number (114816).

2^1648521 is an apocalyptic number.

It is an amenable number.

1648521 is a deficient number, since it is larger than the sum of its proper divisors (1107063).

1648521 is a wasteful number, since it uses less digits than its factorization.

1648521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 338 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1648521 is about 1283.9474288303. The cubic root of 1648521 is about 118.1312577520.

The spelling of 1648521 in words is "one million, six hundred forty-eight thousand, five hundred twenty-one".