1197557159 has 4 divisors (see below), whose sum is σ = 1197637416. Its totient is φ = 1197476904.

The previous prime is 1197557143. The next prime is 1197557177. The reversal of 1197557159 is 9517557911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9517557911 = 41221 ⋅230891.

It is a cyclic number.

It is not a de Polignac number, because 1197557159 - 2⁴ = 1197557143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197556159) 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, 10409 + ... + 50034.

It is an arithmetic number, because the mean of its divisors is an integer number (299409354).

Almost surely, 2^1197557159 is an apocalyptic number.

1197557159 is a deficient number, since it is larger than the sum of its proper divisors (80257).

1197557159 is an equidigital number, since it uses as much as digits as its factorization.

1197557159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80256.

The product of its digits is 496125, while the sum is 50.

The square root of 1197557159 is about 34605.7388159825. The cubic root of 1197557159 is about 1061.9369943458.

The spelling of 1197557159 in words is "one billion, one hundred ninety-seven million, five hundred fifty-seven thousand, one hundred fifty-nine".