1197578 has 4 divisors (see below), whose sum is σ = 1796370. Its totient is φ = 598788.

The previous prime is 1197577. The next prime is 1197601. The reversal of 1197578 is 8757911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8757911 = 83 ⋅105517.

It can be written as a sum of positive squares in only one way, i.e., 954529 + 243049 = 977^2 + 493^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1197571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 299393 + ... + 299396.

2^1197578 is an apocalyptic number.

1197578 is a deficient number, since it is larger than the sum of its proper divisors (598792).

1197578 is an equidigital number, since it uses as much as digits as its factorization.

1197578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598791.

The product of its digits is 17640, while the sum is 38.

The square root of 1197578 is about 1094.3390699413. The cubic root of 1197578 is about 106.1943154581.

The spelling of 1197578 in words is "one million, one hundred ninety-seven thousand, five hundred seventy-eight".