1287495 has 60 divisors (see below), whose sum is σ = 2674584. Its totient is φ = 587520.

The previous prime is 1287491. The next prime is 1287499. The reversal of 1287495 is 5947821.

It is an interprime number because it is at equal distance from previous prime (1287491) and next prime (1287499).

It is not a de Polignac number, because 1287495 - 2² = 1287491 is a prime.

It is an Ulam number.

Its product of digits (20160) is a multiple of the sum of its prime divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287491) 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 59 ways as a sum of consecutive naturals, for example, 75727 + ... + 75743.

2^1287495 is an apocalyptic number.

1287495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1287495 is an abundant number, since it is smaller than the sum of its proper divisors (1387089).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287495 is a wasteful number, since it uses less digits than its factorization.

1287495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 36 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1287495 is about 1134.6783685256. The cubic root of 1287495 is about 108.7882148693.

It can be divided in two parts, 1 and 287495, that added together give a cube (287496 = 66³).

The spelling of 1287495 in words is "one million, two hundred eighty-seven thousand, four hundred ninety-five".