1198642 has 4 divisors (see below), whose sum is σ = 1797966. Its totient is φ = 599320.

The previous prime is 1198621. The next prime is 1198643. The reversal of 1198642 is 2468911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2468911 = 211 ⋅11701.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 408321 = 889^2 + 639^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1198643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 299659 + ... + 299662.

2^1198642 is an apocalyptic number.

1198642 is a deficient number, since it is larger than the sum of its proper divisors (599324).

1198642 is an equidigital number, since it uses as much as digits as its factorization.

1198642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599323.

The product of its digits is 3456, while the sum is 31.

The square root of 1198642 is about 1094.8251001872. The cubic root of 1198642 is about 106.2257559448.

The spelling of 1198642 in words is "one million, one hundred ninety-eight thousand, six hundred forty-two".