1290888 has 24 divisors (see below), whose sum is σ = 3496350. Its totient is φ = 430272.

The previous prime is 1290869. The next prime is 1290901. The reversal of 1290888 is 8880921.

It can be written as a sum of positive squares in only one way, i.e., 1077444 + 213444 = 1038^2 + 462^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8893 + ... + 9036.

2^1290888 is an apocalyptic number.

1290888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1290888 is an abundant number, since it is smaller than the sum of its proper divisors (2205462).

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

1290888 is a wasteful number, since it uses less digits than its factorization.

1290888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17941 (or 17934 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1290888 is about 1136.1725221110. The cubic root of 1290888 is about 108.8836960517.

It can be divided in two parts, 12908 and 88, that added together give a square (12996 = 114²).

The spelling of 1290888 in words is "one million, two hundred ninety thousand, eight hundred eighty-eight".