1329290 has 8 divisors (see below), whose sum is σ = 2392740. Its totient is φ = 531712.

The previous prime is 1329287. The next prime is 1329313. The reversal of 1329290 is 929231.

It can be written as a sum of positive squares in 2 ways, for example, as 1324801 + 4489 = 1151^2 + 67^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66455 + ... + 66474.

2^1329290 is an apocalyptic number.

1329290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1329290 is a deficient number, since it is larger than the sum of its proper divisors (1063450).

1329290 is a wasteful number, since it uses less digits than its factorization.

1329290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132936.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1329290 is about 1152.9483943351. The cubic root of 1329290 is about 109.9528723738.

The spelling of 1329290 in words is "one million, three hundred twenty-nine thousand, two hundred ninety".