1290028 has 24 divisors (see below), whose sum is σ = 2437344. Its totient is φ = 595200.

The previous prime is 1290019. The next prime is 1290031. The reversal of 1290028 is 8200921.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1289990 and 1290008.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3993 + ... + 4303.

It is an arithmetic number, because the mean of its divisors is an integer number (101556).

2^1290028 is an apocalyptic number.

It is an amenable number.

1290028 is a deficient number, since it is larger than the sum of its proper divisors (1147316).

1290028 is a wasteful number, since it uses less digits than its factorization.

1290028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1290028 is about 1135.7939954059. The cubic root of 1290028 is about 108.8595109479.

Adding to 1290028 its reverse (8200921), we get a palindrome (9490949).

The spelling of 1290028 in words is "one million, two hundred ninety thousand, twenty-eight".