1170255815 has 4 divisors (see below), whose sum is σ = 1404306984. Its totient is φ = 936204648.

The previous prime is 1170255803. The next prime is 1170255817. The reversal of 1170255815 is 5185520711.

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 1170255815 - 2⁴ = 1170255799 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 (1170255817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117025577 + ... + 117025586.

It is an arithmetic number, because the mean of its divisors is an integer number (351076746).

Almost surely, 2^1170255815 is an apocalyptic number.

1170255815 is a deficient number, since it is larger than the sum of its proper divisors (234051169).

1170255815 is an equidigital number, since it uses as much as digits as its factorization.

1170255815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234051168.

The product of its (nonzero) digits is 14000, while the sum is 35.

The square root of 1170255815 is about 34209.0019585489. The cubic root of 1170255815 is about 1053.8050350088.

The spelling of 1170255815 in words is "one billion, one hundred seventy million, two hundred fifty-five thousand, eight hundred fifteen".