1213306242 has 16 divisors (see below), whose sum is σ = 2427348000. Its totient is φ = 404312832.

The previous prime is 1213306231. The next prime is 1213306243. The reversal of 1213306242 is 2426033121.

It is a super-2 number, since 2×1213306242² = 2944224073752325128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213306243) 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 7 ways as a sum of consecutive naturals, for example, 7903 + ... + 49890.

It is an arithmetic number, because the mean of its divisors is an integer number (151709250).

Almost surely, 2^1213306242 is an apocalyptic number.

1213306242 is an abundant number, since it is smaller than the sum of its proper divisors (1214041758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213306242 is a wasteful number, since it uses less digits than its factorization.

1213306242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61297.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1213306242 is about 34832.5457295329. The cubic root of 1213306242 is about 1066.5719157807.

Adding to 1213306242 its reverse (2426033121), we get a palindrome (3639339363).

The spelling of 1213306242 in words is "one billion, two hundred thirteen million, three hundred six thousand, two hundred forty-two".