1288906 has 16 divisors (see below), whose sum is σ = 2068416. Its totient is φ = 600256.

The previous prime is 1288891. The next prime is 1288919. The reversal of 1288906 is 6098821.

It is a super-2 number, since 2×1288906² = 3322557353672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5565 + ... + 5791.

It is an arithmetic number, because the mean of its divisors is an integer number (129276).

2^1288906 is an apocalyptic number.

1288906 is a deficient number, since it is larger than the sum of its proper divisors (779510).

1288906 is a wasteful number, since it uses less digits than its factorization.

1288906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1288906 is about 1135.2999603629. The cubic root of 1288906 is about 108.8279416593.

The spelling of 1288906 in words is "one million, two hundred eighty-eight thousand, nine hundred six".