1287612 has 36 divisors (see below), whose sum is σ = 3328416. Its totient is φ = 419520.

The previous prime is 1287607. The next prime is 1287613. The reversal of 1287612 is 2167821.

It is a tau number, because it is divible by the number of its divisors (36).

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 (1287613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (92456).

2^1287612 is an apocalyptic number.

1287612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664208).

1287612 is an abundant number, since it is smaller than the sum of its proper divisors (2040804).

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

1287612 is a wasteful number, since it uses less digits than its factorization.

1287612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 813 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1287612 is about 1134.7299238145. The cubic root of 1287612 is about 108.7915101146.

The spelling of 1287612 in words is "one million, two hundred eighty-seven thousand, six hundred twelve".