1171223172 has 96 divisors (see below), whose sum is σ = 3476695040. Its totient is φ = 334018080.

The previous prime is 1171223167. The next prime is 1171223173. The reversal of 1171223172 is 2713221711.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1171223173) 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, 548547 + ... + 550677.

Almost surely, 2^1171223172 is an apocalyptic number.

1171223172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171223172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738347520).

1171223172 is an abundant number, since it is smaller than the sum of its proper divisors (2305471868).

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

1171223172 is a wasteful number, since it uses less digits than its factorization.

1171223172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878 (or 2870 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 1171223172 is about 34223.1379624955. The cubic root of 1171223172 is about 1054.0953205190.

Adding to 1171223172 its reverse (2713221711), we get a palindrome (3884444883).

The spelling of 1171223172 in words is "one billion, one hundred seventy-one million, two hundred twenty-three thousand, one hundred seventy-two".