1287795 has 8 divisors (see below), whose sum is σ = 2060496. Its totient is φ = 686816.

The previous prime is 1287787. The next prime is 1287799. The reversal of 1287795 is 5977821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287795 - 2³ = 1287787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1287799) 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, 42912 + ... + 42941.

It is an arithmetic number, because the mean of its divisors is an integer number (257562).

2^1287795 is an apocalyptic number.

1287795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1287795 is a deficient number, since it is larger than the sum of its proper divisors (772701).

1287795 is an equidigital number, since it uses as much as digits as its factorization.

1287795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85861.

The product of its digits is 35280, while the sum is 39.

The square root of 1287795 is about 1134.8105568772. The cubic root of 1287795 is about 108.7966638160.

It can be divided in two parts, 1287 and 795, that multiplied together give a triangular number (1023165 = T₁₄₃₀).

The spelling of 1287795 in words is "one million, two hundred eighty-seven thousand, seven hundred ninety-five".