1156128 has 24 divisors (see below), whose sum is σ = 3035088. Its totient is φ = 385344.

The previous prime is 1156121. The next prime is 1156151. The reversal of 1156128 is 8216511.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1156098 and 1156107.

It is not an unprimeable number, because it can be changed into a prime (1156121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5926 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (126462).

2^1156128 is an apocalyptic number.

It is an amenable number.

1156128 is an abundant number, since it is smaller than the sum of its proper divisors (1878960).

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

1156128 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 1156128 = (2151816)₉.

1156128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12056 (or 12048 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 1156128 is about 1075.2339280361. The cubic root of 1156128 is about 104.9547197051.

The spelling of 1156128 in words is "one million, one hundred fifty-six thousand, one hundred twenty-eight".