1288899 has 8 divisors (see below), whose sum is σ = 1909520. Its totient is φ = 859248.

The previous prime is 1288891. The next prime is 1288919. The reversal of 1288899 is 9988821.

It is not a de Polignac number, because 1288899 - 2³ = 1288891 is a prime.

It is a super-2 number, since 2×1288899² = 3322521264402, which contains 22 as substring.

It is a Duffinian number.

1288899 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1288891) by changing a digit.

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, 23842 + ... + 23895.

It is an arithmetic number, because the mean of its divisors is an integer number (238690).

2^1288899 is an apocalyptic number.

1288899 is a deficient number, since it is larger than the sum of its proper divisors (620621).

1288899 is an equidigital number, since it uses as much as digits as its factorization.

1288899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47746 (or 47740 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1288899 is about 1135.2968774730. The cubic root of 1288899 is about 108.8277446454.

It can be divided in two parts, 1288 and 899, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1288899 in words is "one million, two hundred eighty-eight thousand, eight hundred ninety-nine".