1187213275 has 24 divisors (see below), whose sum is σ = 1576305360. Its totient is φ = 883829760.

The previous prime is 1187213263. The next prime is 1187213323. The reversal of 1187213275 is 5723127811.

It is not a de Polignac number, because 1187213275 - 2⁵ = 1187213243 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 22132 + ... + 53518.

It is an arithmetic number, because the mean of its divisors is an integer number (65679390).

Almost surely, 2^1187213275 is an apocalyptic number.

1187213275 is a deficient number, since it is larger than the sum of its proper divisors (389092085).

1187213275 is a wasteful number, since it uses less digits than its factorization.

1187213275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31503 (or 31498 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 1187213275 is about 34455.9613855135. The cubic root of 1187213275 is about 1058.8706599739.

The spelling of 1187213275 in words is "one billion, one hundred eighty-seven million, two hundred thirteen thousand, two hundred seventy-five".