1155960 has 144 divisors (see below), whose sum is σ = 4282200. Its totient is φ = 269568.

The previous prime is 1155953. The next prime is 1155961. The reversal of 1155960 is 695511.

1155960 is a nontrivial binomial coefficient, being equal to C(1521, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155961) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60831 + ... + 60849.

2^1155960 is an apocalyptic number.

1155960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155960 is the 1520-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141100).

1155960 is an abundant number, since it is smaller than the sum of its proper divisors (3126240).

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

1155960 is a wasteful number, since it uses less digits than its factorization.

1155960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 1155960 is about 1075.1558026630. The cubic root of 1155960 is about 104.9496357101.

It can be divided in two parts, 1 and 155960, that added together give a triangular number (155961 = T₅₅₈).

The spelling of 1155960 in words is "one million, one hundred fifty-five thousand, nine hundred sixty".