1290990 has 32 divisors (see below), whose sum is σ = 3234816. Its totient is φ = 329120.

The previous prime is 1290983. The next prime is 1291001. The reversal of 1290990 is 990921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 246 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2^1290990 is an apocalyptic number.

1290990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1290990 is an abundant number, since it is smaller than the sum of its proper divisors (1943826).

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

1290990 is a wasteful number, since it uses less digits than its factorization.

1290990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 1290990 is about 1136.2174087735. The cubic root of 1290990 is about 108.8865638049.

The spelling of 1290990 in words is "one million, two hundred ninety thousand, nine hundred ninety".