1198649 has 4 divisors (see below), whose sum is σ = 1201536. Its totient is φ = 1195764.

The previous prime is 1198643. The next prime is 1198651. The reversal of 1198649 is 9468911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1198649 - 2¹² = 1194553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon 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 in 3 ways as a sum of consecutive naturals, for example, 689 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (300384).

2^1198649 is an apocalyptic number.

It is an amenable number.

1198649 is a deficient number, since it is larger than the sum of its proper divisors (2887).

1198649 is an equidigital number, since it uses as much as digits as its factorization.

1198649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886.

The product of its digits is 15552, while the sum is 38.

The square root of 1198649 is about 1094.8282970402. The cubic root of 1198649 is about 106.2259627285.

The spelling of 1198649 in words is "one million, one hundred ninety-eight thousand, six hundred forty-nine".