1288170 has 64 divisors (see below), whose sum is σ = 3709440. Its totient is φ = 316224.

The previous prime is 1288169. The next prime is 1288171. The reversal of 1288170 is 718821.

It is an interprime number because it is at equal distance from previous prime (1288169) and next prime (1288171).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1288171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3327 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (57960).

2^1288170 is an apocalyptic number.

1288170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1854720).

1288170 is an abundant number, since it is smaller than the sum of its proper divisors (2421270).

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

1288170 is a wasteful number, since it uses less digits than its factorization.

1288170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1288170 is about 1134.9757706665. The cubic root of 1288170 is about 108.8072231544.

The spelling of 1288170 in words is "one million, two hundred eighty-eight thousand, one hundred seventy".