1290090 has 16 divisors (see below), whose sum is σ = 3096288. Its totient is φ = 344016.

The previous prime is 1290083. The next prime is 1290109. The reversal of 1290090 is 900921.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21472 + ... + 21531.

It is an arithmetic number, because the mean of its divisors is an integer number (193518).

2^1290090 is an apocalyptic number.

1290090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1290090 is an abundant number, since it is smaller than the sum of its proper divisors (1806198).

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

1290090 is a wasteful number, since it uses less digits than its factorization.

1290090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43013.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1290090 is about 1135.8212887598. The cubic root of 1290090 is about 108.8612548846.

The spelling of 1290090 in words is "one million, two hundred ninety thousand, ninety".