1198631 has 4 divisors (see below), whose sum is σ = 1369872. Its totient is φ = 1027392.

The previous prime is 1198621. The next prime is 1198643. The reversal of 1198631 is 1368911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1198631 - 2¹⁸ = 936487 is a prime.

It is a super-2 number, since 2×1198631² = 2873432548322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1198594 and 1198603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198621) 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, 85610 + ... + 85623.

It is an arithmetic number, because the mean of its divisors is an integer number (342468).

2^1198631 is an apocalyptic number.

1198631 is a deficient number, since it is larger than the sum of its proper divisors (171241).

1198631 is an equidigital number, since it uses as much as digits as its factorization.

1198631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171240.

The product of its digits is 1296, while the sum is 29.

The square root of 1198631 is about 1094.8200765423. The cubic root of 1198631 is about 106.2254309974.

The spelling of 1198631 in words is "one million, one hundred ninety-eight thousand, six hundred thirty-one".