1172155072 has 84 divisors (see below), whose sum is σ = 2668237488. Its totient is φ = 509555200.

The previous prime is 1172155069. The next prime is 1172155091. The reversal of 1172155072 is 2705512711.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174822 + ... + 181402.

It is an arithmetic number, because the mean of its divisors is an integer number (31764732).

Almost surely, 2^1172155072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172155072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1334118744).

1172155072 is an abundant number, since it is smaller than the sum of its proper divisors (1496082416).

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

1172155072 is a wasteful number, since it uses less digits than its factorization.

1172155072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6638 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 1172155072 is about 34236.7503130773. The cubic root of 1172155072 is about 1054.3748149365.

Adding to 1172155072 its reverse (2705512711), we get a palindrome (3877667783).

The spelling of 1172155072 in words is "one billion, one hundred seventy-two million, one hundred fifty-five thousand, seventy-two".