1521868 has 12 divisors (see below), whose sum is σ = 2690352. Its totient is φ = 753200.

The previous prime is 1521859. The next prime is 1521869. The reversal of 1521868 is 8681251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (224196).

2^1521868 is an apocalyptic number.

It is an amenable number.

1521868 is a deficient number, since it is larger than the sum of its proper divisors (1168484).

1521868 is a wasteful number, since it uses less digits than its factorization.

1521868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3870 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 1521868 is about 1233.6401420187. The cubic root of 1521868 is about 115.0250229102.

The spelling of 1521868 in words is "one million, five hundred twenty-one thousand, eight hundred sixty-eight".