1230542 has 8 divisors (see below), whose sum is σ = 1865136. Its totient is φ = 608832.

The previous prime is 1230539. The next prime is 1230547. The reversal of 1230542 is 2450321.

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

It is a super-2 number, since 2×1230542² = 3028467227528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1230542.

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 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, 2978 + ... + 3365.

It is an arithmetic number, because the mean of its divisors is an integer number (233142).

2^1230542 is an apocalyptic number.

1230542 is a deficient number, since it is larger than the sum of its proper divisors (634594).

1230542 is an equidigital number, since it uses as much as digits as its factorization.

1230542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1230542 is about 1109.2979761994. The cubic root of 1230542 is about 107.1598623591.

Adding to 1230542 its reverse (2450321), we get a palindrome (3680863).

The spelling of 1230542 in words is "one million, two hundred thirty thousand, five hundred forty-two".