1230553 has 4 divisors (see below), whose sum is σ = 1250788. Its totient is φ = 1210320.

The previous prime is 1230547. The next prime is 1230571. The reversal of 1230553 is 3550321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3550321 = 19 ⋅186859.

It can be written as a sum of positive squares in 2 ways, for example, as 700569 + 529984 = 837^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230553 - 2⁵ = 1230521 is a prime.

It is a Duffinian number.

1230553 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230553.

It is not an unprimeable number, because it can be changed into a prime (1231553) 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, 10026 + ... + 10147.

It is an arithmetic number, because the mean of its divisors is an integer number (312697).

2^1230553 is an apocalyptic number.

It is an amenable number.

1230553 is a deficient number, since it is larger than the sum of its proper divisors (20235).

1230553 is an equidigital number, since it uses as much as digits as its factorization.

1230553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20234.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 1230553 is about 1109.3029342790. The cubic root of 1230553 is about 107.1601816642.

Adding to 1230553 its reverse (3550321), we get a palindrome (4780874).

The spelling of 1230553 in words is "one million, two hundred thirty thousand, five hundred fifty-three".