1287696 has 40 divisors (see below), whose sum is σ = 3367840. Its totient is φ = 423936.

The previous prime is 1287691. The next prime is 1287697. The reversal of 1287696 is 6967821.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287691) 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, 6576 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (84196).

2^1287696 is an apocalyptic number.

1287696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1287696 is an abundant number, since it is smaller than the sum of its proper divisors (2080144).

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

1287696 is a wasteful number, since it uses less digits than its factorization.

1287696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 1287696 is about 1134.7669364235. The cubic root of 1287696 is about 108.7938758087.

The spelling of 1287696 in words is "one million, two hundred eighty-seven thousand, six hundred ninety-six".