1213355742 has 16 divisors (see below), whose sum is σ = 2444171520. Its totient is φ = 401541912.

The previous prime is 1213355719. The next prime is 1213355743. The reversal of 1213355742 is 2475533121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213355743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726598 + ... + 728265.

It is an arithmetic number, because the mean of its divisors is an integer number (152760720).

Almost surely, 2^1213355742 is an apocalyptic number.

1213355742 is an abundant number, since it is smaller than the sum of its proper divisors (1230815778).

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

1213355742 is a wasteful number, since it uses less digits than its factorization.

1213355742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455007.

The product of its digits is 25200, while the sum is 33.

The square root of 1213355742 is about 34833.2562646675. The cubic root of 1213355742 is about 1066.5864201133.

Adding to 1213355742 its reverse (2475533121), we get a palindrome (3688888863).

The spelling of 1213355742 in words is "one billion, two hundred thirteen million, three hundred fifty-five thousand, seven hundred forty-two".