1695 has 8 divisors (see below), whose sum is σ = 2736.
Its totient is φ = 896.
The previous prime is 1693. The next prime is 1697. The reversal of 1695 is 5961.
It is an interprime number because it is at equal distance from previous prime (1693) and next prime (1697).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a 7-Lehmer number, since φ(1695) divides (1695-1)7.
It is a cyclic number.
It is not a de Polignac number, because 1695 - 21 = 1693 is a prime.
It is a plaindrome in base 16.
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1693) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 71.
It is an arithmetic number, because the mean of its divisors is an integer number (342).
It is the magic constant of a 15 × 15 magic square.
21695 is an apocalyptic number.
1695 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
1695 is a deficient number, since it is larger than the sum of its proper divisors (1041).
1695 is a wasteful number, since it uses less digits than its factorization.
1695 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 121.
The product of its digits is 270, while the sum is 21.
The square root of 1695 is about 41.1703777005.
The cubic root of 1695 is about 11.9231196135.
The spelling of 1695 in words is "one thousand, six hundred ninety-five".