1155256 has 8 divisors (see below), whose sum is σ = 2166120. Its totient is φ = 577624.

The previous prime is 1155247. The next prime is 1155263. The reversal of 1155256 is 6525511.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72196 + ... + 72211.

It is an arithmetic number, because the mean of its divisors is an integer number (270765).

2^1155256 is an apocalyptic number.

It is an amenable number.

1155256 is a deficient number, since it is larger than the sum of its proper divisors (1010864).

1155256 is a wasteful number, since it uses less digits than its factorization.

1155256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144413 (or 144409 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 1155256 is about 1074.8283583903. The cubic root of 1155256 is about 104.9283259913.

The spelling of 1155256 in words is "one million, one hundred fifty-five thousand, two hundred fifty-six".