1195991457 has 8 divisors (see below), whose sum is σ = 1597346784. Its totient is φ = 795981888.

The previous prime is 1195991417. The next prime is 1195991483. The reversal of 1195991457 is 7541995911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1195991457 - 2¹² = 1195987361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1195991417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334363 + ... + 337920.

It is an arithmetic number, because the mean of its divisors is an integer number (199668348).

Almost surely, 2^1195991457 is an apocalyptic number.

It is an amenable number.

1195991457 is a deficient number, since it is larger than the sum of its proper divisors (401355327).

1195991457 is an equidigital number, since it uses as much as digits as its factorization.

1195991457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672879.

The product of its digits is 510300, while the sum is 51.

The square root of 1195991457 is about 34583.1094177490. The cubic root of 1195991457 is about 1061.4739957067.

The spelling of 1195991457 in words is "one billion, one hundred ninety-five million, nine hundred ninety-one thousand, four hundred fifty-seven".