1331490 has 16 divisors (see below), whose sum is σ = 3195648. Its totient is φ = 355056.

The previous prime is 1331489. The next prime is 1331497. The reversal of 1331490 is 941331.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22162 + ... + 22221.

It is an arithmetic number, because the mean of its divisors is an integer number (199728).

2^1331490 is an apocalyptic number.

1331490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331490 is an abundant number, since it is smaller than the sum of its proper divisors (1864158).

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

1331490 is a wasteful number, since it uses less digits than its factorization.

1331490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44393.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1331490 is about 1153.9020755679. The cubic root of 1331490 is about 110.0134969664.

The spelling of 1331490 in words is "one million, three hundred thirty-one thousand, four hundred ninety".