1685137 has 4 divisors (see below), whose sum is σ = 1688500. Its totient is φ = 1681776.

The previous prime is 1685119. The next prime is 1685153. The reversal of 1685137 is 7315861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7315861 = 7 ⋅1045123.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 1615441 = 264^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685137 - 2¹¹ = 1683089 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 1685099 and 1685108.

It is not an unprimeable number, because it can be changed into a prime (1685107) 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, 762 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (422125).

2^1685137 is an apocalyptic number.

It is an amenable number.

1685137 is a deficient number, since it is larger than the sum of its proper divisors (3363).

1685137 is an equidigital number, since it uses as much as digits as its factorization.

1685137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its digits is 5040, while the sum is 31.

The square root of 1685137 is about 1298.1282679304. The cubic root of 1685137 is about 118.9994821435. Note that the first 3 decimals are identical.

The spelling of 1685137 in words is "one million, six hundred eighty-five thousand, one hundred thirty-seven".