1279898 has 4 divisors (see below), whose sum is σ = 1919850. Its totient is φ = 639948.

The previous prime is 1279877. The next prime is 1279907. The reversal of 1279898 is 8989721.

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., 1261129 + 18769 = 1123^2 + 137^2 .

It is a Curzon number.

It is an unprimeable number.

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, 319973 + ... + 319976.

2^1279898 is an apocalyptic number.

1279898 is a deficient number, since it is larger than the sum of its proper divisors (639952).

1279898 is an equidigital number, since it uses as much as digits as its factorization.

1279898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639951.

The product of its digits is 72576, while the sum is 44.

The square root of 1279898 is about 1131.3257709431. The cubic root of 1279898 is about 108.5738205185.

The spelling of 1279898 in words is "one million, two hundred seventy-nine thousand, eight hundred ninety-eight".