1156172072 has 32 divisors (see below), whose sum is σ = 2393405280. Its totient is φ = 519197760.

The previous prime is 1156172053. The next prime is 1156172093. The reversal of 1156172072 is 2702716511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71843 + ... + 86450.

It is an arithmetic number, because the mean of its divisors is an integer number (74793915).

Almost surely, 2^1156172072 is an apocalyptic number.

It is an amenable number.

1156172072 is an abundant number, since it is smaller than the sum of its proper divisors (1237233208).

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

1156172072 is a wasteful number, since it uses less digits than its factorization.

1156172072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158393 (or 158389 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 1156172072 is about 34002.5303764293. The cubic root of 1156172072 is about 1049.5605332493.

Adding to 1156172072 its reverse (2702716511), we get a palindrome (3858888583).

The spelling of 1156172072 in words is "one billion, one hundred fifty-six million, one hundred seventy-two thousand, seventy-two".