1171056215 has 32 divisors (see below), whose sum is σ = 1639440000. Its totient is φ = 786475008.

The previous prime is 1171056209. The next prime is 1171056239. The reversal of 1171056215 is 5126501711.

It is a cyclic number.

It is not a de Polignac number, because 1171056215 - 2⁸ = 1171055959 is a prime.

It is a super-5 number, since 5×1171056215⁵ (a number of 47 digits) contains 55555 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337811 + ... + 341259.

It is an arithmetic number, because the mean of its divisors is an integer number (51232500).

Almost surely, 2^1171056215 is an apocalyptic number.

1171056215 is a deficient number, since it is larger than the sum of its proper divisors (468383785).

1171056215 is a wasteful number, since it uses less digits than its factorization.

1171056215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659.

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 1171056215 is about 34220.6986340139. The cubic root of 1171056215 is about 1054.0452313019.

Adding to 1171056215 its reverse (5126501711), we get a palindrome (6297557926).

The spelling of 1171056215 in words is "one billion, one hundred seventy-one million, fifty-six thousand, two hundred fifteen".