1287069 has 16 divisors (see below), whose sum is σ = 1978368. Its totient is φ = 729072.

The previous prime is 1287067. The next prime is 1287071. The reversal of 1287069 is 9607821.

It is an interprime number because it is at equal distance from previous prime (1287067) and next prime (1287071).

It is not a de Polignac number, because 1287069 - 2¹ = 1287067 is a prime.

It is a super-2 number, since 2×1287069² = 3313093221522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3324 + ... + 3690.

It is an arithmetic number, because the mean of its divisors is an integer number (123648).

2^1287069 is an apocalyptic number.

It is an amenable number.

1287069 is a deficient number, since it is larger than the sum of its proper divisors (691299).

1287069 is a wasteful number, since it uses less digits than its factorization.

1287069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1287069 is about 1134.4906346022. The cubic root of 1287069 is about 108.7762151096.

The spelling of 1287069 in words is "one million, two hundred eighty-seven thousand, sixty-nine".