1198157 has 2 divisors, whose sum is σ = 1198158. Its totient is φ = 1198156.

The previous prime is 1198151. The next prime is 1198187. The reversal of 1198157 is 7518911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763876 + 434281 = 874^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198157 - 2⁸ = 1197901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599078 + 599079.

It is an arithmetic number, because the mean of its divisors is an integer number (599079).

2^1198157 is an apocalyptic number.

It is an amenable number.

1198157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198157 is an equidigital number, since it uses as much as digits as its factorization.

1198157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1198157 is about 1094.6035812110. The cubic root of 1198157 is about 106.2114268285.

The spelling of 1198157 in words is "one million, one hundred ninety-eight thousand, one hundred fifty-seven".