1242430313 has 4 divisors (see below), whose sum is σ = 1242687108. Its totient is φ = 1242173520.

The previous prime is 1242430309. The next prime is 1242430337. The reversal of 1242430313 is 3130342421.

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 238300969 + 1004129344 = 15437^2 + 31688^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242430313 - 2² = 1242430309 is a prime.

It is a super-2 number, since 2×1242430313² = 3087266165322555938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242430303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120998 + ... + 130863.

It is an arithmetic number, because the mean of its divisors is an integer number (310671777).

Almost surely, 2^1242430313 is an apocalyptic number.

It is an amenable number.

1242430313 is a deficient number, since it is larger than the sum of its proper divisors (256795).

1242430313 is an equidigital number, since it uses as much as digits as its factorization.

1242430313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256794.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1242430313 is about 35248.1249572229. The cubic root of 1242430313 is about 1075.0384880397.

Adding to 1242430313 its reverse (3130342421), we get a palindrome (4372772734).

The spelling of 1242430313 in words is "one billion, two hundred forty-two million, four hundred thirty thousand, three hundred thirteen".