1197145087 has 4 divisors (see below), whose sum is σ = 1202112736. Its totient is φ = 1192177440.

The previous prime is 1197145067. The next prime is 1197145091. The reversal of 1197145087 is 7805417911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1197145087 - 2⁷ = 1197144959 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 (1197145057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483463 + ... + 2483944.

It is an arithmetic number, because the mean of its divisors is an integer number (300528184).

Almost surely, 2^1197145087 is an apocalyptic number.

1197145087 is a deficient number, since it is larger than the sum of its proper divisors (4967649).

1197145087 is an equidigital number, since it uses as much as digits as its factorization.

1197145087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967648.

The product of its (nonzero) digits is 70560, while the sum is 43.

The square root of 1197145087 is about 34599.7844935485. The cubic root of 1197145087 is about 1061.8151783922.

The spelling of 1197145087 in words is "one billion, one hundred ninety-seven million, one hundred forty-five thousand, eighty-seven".