1298378 has 8 divisors (see below), whose sum is σ = 1974468. Its totient is φ = 640224.

The previous prime is 1298371. The next prime is 1298387. The reversal of 1298378 is 8738921.

It can be written as a sum of positive squares in 2 ways, for example, as 1261129 + 37249 = 1123^2 + 193^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1298371) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4301 + ... + 4592.

2^1298378 is an apocalyptic number.

1298378 is a deficient number, since it is larger than the sum of its proper divisors (676090).

1298378 is an equidigital number, since it uses as much as digits as its factorization.

1298378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8968.

The product of its digits is 24192, while the sum is 38.

The square root of 1298378 is about 1139.4639090379. The cubic root of 1298378 is about 109.0938786650.

The spelling of 1298378 in words is "one million, two hundred ninety-eight thousand, three hundred seventy-eight".