1423555 has 16 divisors (see below), whose sum is σ = 1978560. Its totient is φ = 963072.

The previous prime is 1423553. The next prime is 1423579. The reversal of 1423555 is 5553241.

It is a cyclic number.

It is not a de Polignac number, because 1423555 - 2¹ = 1423553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1423553) 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 15 ways as a sum of consecutive naturals, for example, 2887 + ... + 3343.

It is an arithmetic number, because the mean of its divisors is an integer number (123660).

2^1423555 is an apocalyptic number.

1423555 is a deficient number, since it is larger than the sum of its proper divisors (555005).

1423555 is an equidigital number, since it uses as much as digits as its factorization.

1423555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its digits is 3000, while the sum is 25.

The square root of 1423555 is about 1193.1282412214. The cubic root of 1423555 is about 112.4928061244.

Adding to 1423555 its reverse (5553241), we get a palindrome (6976796).

The spelling of 1423555 in words is "one million, four hundred twenty-three thousand, five hundred fifty-five".