1198651 has 2 divisors, whose sum is σ = 1198652. Its totient is φ = 1198650.

The previous prime is 1198643. The next prime is 1198661. The reversal of 1198651 is 1568911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1198651 - 2³ = 1198643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599325 + 599326.

It is an arithmetic number, because the mean of its divisors is an integer number (599326).

2^1198651 is an apocalyptic number.

1198651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198651 is an equidigital number, since it uses as much as digits as its factorization.

1198651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 31.

The square root of 1198651 is about 1094.8292104251. The cubic root of 1198651 is about 106.2260218094.

It can be divided in two parts, 1198 and 651, that added together give a square (1849 = 43²).

The spelling of 1198651 in words is "one million, one hundred ninety-eight thousand, six hundred fifty-one".