1187245279 has 8 divisors (see below), whose sum is σ = 1299756672. Its totient is φ = 1075497240.

The previous prime is 1187245277. The next prime is 1187245313. The reversal of 1187245279 is 9725427811.

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

It is a cyclic number.

It is not a de Polignac number, because 1187245279 - 2¹ = 1187245277 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 (1187245277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187579 + ... + 193804.

It is an arithmetic number, because the mean of its divisors is an integer number (162469584).

Almost surely, 2^1187245279 is an apocalyptic number.

1187245279 is a deficient number, since it is larger than the sum of its proper divisors (112511393).

1187245279 is a wasteful number, since it uses less digits than its factorization.

1187245279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381677.

The product of its digits is 282240, while the sum is 46.

The square root of 1187245279 is about 34456.4258012929. The cubic root of 1187245279 is about 1058.8801746340.

The spelling of 1187245279 in words is "one billion, one hundred eighty-seven million, two hundred forty-five thousand, two hundred seventy-nine".