1155423 has 4 divisors (see below), whose sum is σ = 1540568. Its totient is φ = 770280.

The previous prime is 1155419. The next prime is 1155431. The reversal of 1155423 is 3245511.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1155423 - 2² = 1155419 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192568 + ... + 192573.

It is an arithmetic number, because the mean of its divisors is an integer number (385142).

2^1155423 is an apocalyptic number.

1155423 is a deficient number, since it is larger than the sum of its proper divisors (385145).

1155423 is an equidigital number, since it uses as much as digits as its factorization.

1155423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385144.

The product of its digits is 600, while the sum is 21.

The square root of 1155423 is about 1074.9060424056. The cubic root of 1155423 is about 104.9333817787.

The spelling of 1155423 in words is "one million, one hundred fifty-five thousand, four hundred twenty-three".