1172871072 has 72 divisors (see below), whose sum is σ = 3531564036. Its totient is φ = 367958016.

The previous prime is 1172871061. The next prime is 1172871097. The reversal of 1172871072 is 2701782711.

It can be written as a sum of positive squares in 2 ways, for example, as 1172103696 + 767376 = 34236^2 + 876^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 114883 + ... + 124674.

Almost surely, 2^1172871072 is an apocalyptic number.

1172871072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1172871072 is an abundant number, since it is smaller than the sum of its proper divisors (2358692964).

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

1172871072 is a wasteful number, since it uses less digits than its factorization.

1172871072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239590 (or 239579 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 36.

The square root of 1172871072 is about 34247.2053166386. The cubic root of 1172871072 is about 1054.5894562478.

The spelling of 1172871072 in words is "one billion, one hundred seventy-two million, eight hundred seventy-one thousand, seventy-two".