1329898 has 4 divisors (see below), whose sum is σ = 1994850. Its totient is φ = 664948.

The previous prime is 1329871. The next prime is 1329899. The reversal of 1329898 is 8989231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 966289 + 363609 = 983^2 + 603^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1329898.

It is not an unprimeable number, because it can be changed into a prime (1329899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332473 + ... + 332476.

2^1329898 is an apocalyptic number.

1329898 is a deficient number, since it is larger than the sum of its proper divisors (664952).

1329898 is an equidigital number, since it uses as much as digits as its factorization.

1329898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664951.

The product of its digits is 31104, while the sum is 40.

The square root of 1329898 is about 1153.2120360107. The cubic root of 1329898 is about 109.9696334911.

It can be divided in two parts, 132 and 9898, that multiplied together give a triangular number (1306536 = T₁₆₁₆).

The spelling of 1329898 in words is "one million, three hundred twenty-nine thousand, eight hundred ninety-eight".