1321198 has 4 divisors (see below), whose sum is σ = 1981800. Its totient is φ = 660598.

The previous prime is 1321193. The next prime is 1321213. The reversal of 1321198 is 8911231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8911231 = 7 ⋅1273033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330298 + ... + 330301.

It is an arithmetic number, because the mean of its divisors is an integer number (495450).

2^1321198 is an apocalyptic number.

1321198 is a deficient number, since it is larger than the sum of its proper divisors (660602).

1321198 is an equidigital number, since it uses as much as digits as its factorization.

1321198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660601.

The product of its digits is 432, while the sum is 25.

The square root of 1321198 is about 1149.4337736468. The cubic root of 1321198 is about 109.7293068639.

The spelling of 1321198 in words is "one million, three hundred twenty-one thousand, one hundred ninety-eight".