1279198 has 4 divisors (see below), whose sum is σ = 1918800. Its totient is φ = 639598.

The previous prime is 1279193. The next prime is 1279211. The reversal of 1279198 is 8919721.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279193) 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, 319798 + ... + 319801.

It is an arithmetic number, because the mean of its divisors is an integer number (479700).

2^1279198 is an apocalyptic number.

1279198 is a deficient number, since it is larger than the sum of its proper divisors (639602).

1279198 is an equidigital number, since it uses as much as digits as its factorization.

1279198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639601.

The product of its digits is 9072, while the sum is 37.

The square root of 1279198 is about 1131.0163570877. The cubic root of 1279198 is about 108.5540232289.

Subtracting from 1279198 its sum of digits (37), we obtain a square (1279161 = 1131²).

The spelling of 1279198 in words is "one million, two hundred seventy-nine thousand, one hundred ninety-eight".