1167171220 has 24 divisors (see below), whose sum is σ = 2455483464. Its totient is φ = 466025856.

The previous prime is 1167171211. The next prime is 1167171233. The reversal of 1167171220 is 221717611.

It can be written as a sum of positive squares in 4 ways, for example, as 152621316 + 1014549904 = 12354^2 + 31852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41247 + ... + 63526.

It is an arithmetic number, because the mean of its divisors is an integer number (102311811).

Almost surely, 2^1167171220 is an apocalyptic number.

1167171220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1167171220 is an abundant number, since it is smaller than the sum of its proper divisors (1288312244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1167171220 is a wasteful number, since it uses less digits than its factorization.

1167171220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105339 (or 105337 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 1167171220 is about 34163.8876593399. The cubic root of 1167171220 is about 1052.8783367988.

Adding to 1167171220 its reverse (221717611), we get a palindrome (1388888831).

The spelling of 1167171220 in words is "one billion, one hundred sixty-seven million, one hundred seventy-one thousand, two hundred twenty".