1155540 has 24 divisors (see below), whose sum is σ = 3235680. Its totient is φ = 308128.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155540 is 455511.

It is a zygodrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9570 + ... + 9689.

It is an arithmetic number, because the mean of its divisors is an integer number (134820).

2^1155540 is an apocalyptic number.

1155540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155540 is an abundant number, since it is smaller than the sum of its proper divisors (2080140).

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

1155540 is a wasteful number, since it uses less digits than its factorization.

1155540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19271 (or 19269 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1155540 is about 1074.9604643893. The cubic root of 1155540 is about 104.9369235671.

The spelling of 1155540 in words is "one million, one hundred fifty-five thousand, five hundred forty".