1155077172 has 120 divisors (see below), whose sum is σ = 3214100736. Its totient is φ = 361957248.

The previous prime is 1155077167. The next prime is 1155077191. The reversal of 1155077172 is 2717705511.

1155077172 is a `hidden beast` number, since 1 + 15 + 507 + 71 + 72 = 666.

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

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1338013 + ... + 1338875.

Almost surely, 2^1155077172 is an apocalyptic number.

1155077172 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 1155077172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607050368).

1155077172 is an abundant number, since it is smaller than the sum of its proper divisors (2059023564).

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

1155077172 is an frugal number, since it uses more digits than its factorization.

1155077172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 36.

The square root of 1155077172 is about 33986.4262905060. The cubic root of 1155077172 is about 1049.2291158069.

The spelling of 1155077172 in words is "one billion, one hundred fifty-five million, seventy-seven thousand, one hundred seventy-two".