1521648 has 30 divisors (see below), whose sum is σ = 4258904. Its totient is φ = 507168.

The previous prime is 1521643. The next prime is 1521649. The reversal of 1521648 is 8461251.

1521648 is a `hidden beast` number, since 15 + 2 + 1 + 648 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5140 + ... + 5427.

2^1521648 is an apocalyptic number.

1521648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1521648 is an abundant number, since it is smaller than the sum of its proper divisors (2737256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1521648 is a wasteful number, since it uses less digits than its factorization.

1521648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10581 (or 10572 counting only the distinct ones).

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

The square root of 1521648 is about 1233.5509717884. The cubic root of 1521648 is about 115.0194800019.

Adding to 1521648 its reverse (8461251), we get a palindrome (9982899).

The spelling of 1521648 in words is "one million, five hundred twenty-one thousand, six hundred forty-eight".