1155455 has 8 divisors (see below), whose sum is σ = 1584672. Its totient is φ = 792288.

The previous prime is 1155449. The next prime is 1155457. The reversal of 1155455 is 5545511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155455 - 2¹⁰ = 1154431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16472 + ... + 16541.

It is an arithmetic number, because the mean of its divisors is an integer number (198084).

2^1155455 is an apocalyptic number.

1155455 is a deficient number, since it is larger than the sum of its proper divisors (429217).

1155455 is an equidigital number, since it uses as much as digits as its factorization.

1155455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33025.

The product of its digits is 2500, while the sum is 26.

The square root of 1155455 is about 1074.9209273244. The cubic root of 1155455 is about 104.9343504967.

It can be divided in two parts, 1155 and 455, that multiplied together give a palindrome (525525).

The spelling of 1155455 in words is "one million, one hundred fifty-five thousand, four hundred fifty-five".