1687064 has 16 divisors (see below), whose sum is σ = 3180600. Its totient is φ = 838912.

The previous prime is 1687061. The next prime is 1687087. The reversal of 1687064 is 4607861.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1687064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687061) 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, 1352 + ... + 2280.

2^1687064 is an apocalyptic number.

It is an amenable number.

1687064 is a deficient number, since it is larger than the sum of its proper divisors (1493536).

1687064 is a wasteful number, since it uses less digits than its factorization.

1687064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1687064 is about 1298.8702783573. The cubic root of 1687064 is about 119.0448245795.

The spelling of 1687064 in words is "one million, six hundred eighty-seven thousand, sixty-four".