1298842 has 4 divisors (see below), whose sum is σ = 1948266. Its totient is φ = 649420.

The previous prime is 1298831. The next prime is 1298849. The reversal of 1298842 is 2488921.

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., 1297321 + 1521 = 1139^2 + 39^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1298798 and 1298807.

It is not an unprimeable number, because it can be changed into a prime (1298849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324709 + ... + 324712.

2^1298842 is an apocalyptic number.

1298842 is a deficient number, since it is larger than the sum of its proper divisors (649424).

1298842 is an equidigital number, since it uses as much as digits as its factorization.

1298842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649423.

The product of its digits is 9216, while the sum is 34.

The square root of 1298842 is about 1139.6674953687. The cubic root of 1298842 is about 109.1068727060.

The spelling of 1298842 in words is "one million, two hundred ninety-eight thousand, eight hundred forty-two".