1288172 has 12 divisors (see below), whose sum is σ = 2263800. Its totient is φ = 641376.

The previous prime is 1288171. The next prime is 1288187. The reversal of 1288172 is 2718821.

It is an Ulam 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 3 ways as a sum of consecutive naturals, for example, 704 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (188650).

2^1288172 is an apocalyptic number.

It is an amenable number.

1288172 is a deficient number, since it is larger than the sum of its proper divisors (975628).

1288172 is a wasteful number, since it uses less digits than its factorization.

1288172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1358 counting only the distinct ones).

The product of its digits is 1792, while the sum is 29.

The square root of 1288172 is about 1134.9766517422. The cubic root of 1288172 is about 108.8072794654.

The spelling of 1288172 in words is "one million, two hundred eighty-eight thousand, one hundred seventy-two".