1156872 has 64 divisors (see below), whose sum is σ = 3168000. Its totient is φ = 350784.

The previous prime is 1156849. The next prime is 1156873. The reversal of 1156872 is 2786511.

It is not an unprimeable number, because it can be changed into a prime (1156873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19579 + ... + 19637.

It is an arithmetic number, because the mean of its divisors is an integer number (49500).

2^1156872 is an apocalyptic number.

1156872 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 1156872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584000).

1156872 is an abundant number, since it is smaller than the sum of its proper divisors (2011128).

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

1156872 is a wasteful number, since it uses less digits than its factorization.

1156872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 126 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 1156872 is about 1075.5798436192. The cubic root of 1156872 is about 104.9772286220.

The spelling of 1156872 in words is "one million, one hundred fifty-six thousand, eight hundred seventy-two".