1230557 has 4 divisors (see below), whose sum is σ = 1273020. Its totient is φ = 1188096.

The previous prime is 1230547. The next prime is 1230571. The reversal of 1230557 is 7550321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 674041 + 556516 = 821^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230557 - 2⁸ = 1230301 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 (1230547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21188 + ... + 21245.

It is an arithmetic number, because the mean of its divisors is an integer number (318255).

2^1230557 is an apocalyptic number.

It is an amenable number.

1230557 is a deficient number, since it is larger than the sum of its proper divisors (42463).

1230557 is an equidigital number, since it uses as much as digits as its factorization.

1230557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42462.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 1230557 is about 1109.3047372116. The cubic root of 1230557 is about 107.1602977746.

Adding to 1230557 its reverse (7550321), we get a palindrome (8780878).

The spelling of 1230557 in words is "one million, two hundred thirty thousand, five hundred fifty-seven".