1171345155 has 32 divisors (see below), whose sum is σ = 2018691840. Its totient is φ = 578067840.

The previous prime is 1171345151. The next prime is 1171345171. The reversal of 1171345155 is 5515431711.

It is not a de Polignac number, because 1171345155 - 2² = 1171345151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1171345151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35536 + ... + 60045.

It is an arithmetic number, because the mean of its divisors is an integer number (63084120).

Almost surely, 2^1171345155 is an apocalyptic number.

1171345155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1171345155 is a deficient number, since it is larger than the sum of its proper divisors (847346685).

1171345155 is a wasteful number, since it uses less digits than its factorization.

1171345155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95651.

The product of its digits is 10500, while the sum is 33.

The square root of 1171345155 is about 34224.9200875619. The cubic root of 1171345155 is about 1054.1319139565.

Adding to 1171345155 its reverse (5515431711), we get a palindrome (6686776866).

The spelling of 1171345155 in words is "one billion, one hundred seventy-one million, three hundred forty-five thousand, one hundred fifty-five".