1290128 has 20 divisors (see below), whose sum is σ = 2856960. Its totient is φ = 552864.

The previous prime is 1290109. The next prime is 1290131. The reversal of 1290128 is 8210921.

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 3 ways as a sum of consecutive naturals, for example, 5648 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (142848).

2^1290128 is an apocalyptic number.

It is an amenable number.

1290128 is an abundant number, since it is smaller than the sum of its proper divisors (1566832).

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

1290128 is a wasteful number, since it uses less digits than its factorization.

1290128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11534 (or 11528 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1290128 is about 1135.8380166203. The cubic root of 1290128 is about 108.8623237215.

The spelling of 1290128 in words is "one million, two hundred ninety thousand, one hundred twenty-eight".