1187685 has 12 divisors (see below), whose sum is σ = 2058732. Its totient is φ = 633408.

The previous prime is 1187657. The next prime is 1187687. The reversal of 1187685 is 5867811.

It can be written as a sum of positive squares in 2 ways, for example, as 471969 + 715716 = 687^2 + 846^2 .

It is not a de Polignac number, because 1187685 - 2⁸ = 1187429 is a prime.

1187685 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187687) 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 11 ways as a sum of consecutive naturals, for example, 13152 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (171561).

2^1187685 is an apocalyptic number.

1187685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1187685 is a deficient number, since it is larger than the sum of its proper divisors (871047).

1187685 is a wasteful number, since it uses less digits than its factorization.

1187685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26404 (or 26401 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 1187685 is about 1089.8096164010. The cubic root of 1187685 is about 105.9010884602.

The spelling of 1187685 in words is "one million, one hundred eighty-seven thousand, six hundred eighty-five".