1223555742 has 24 divisors (see below), whose sum is σ = 2690607816. Its totient is φ = 401764176.

The previous prime is 1223555717. The next prime is 1223555759. The reversal of 1223555742 is 2475553221.

1223555742 is a `hidden beast` number, since 12 + 23 + 55 + 574 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1223555697 and 1223555706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 506073 + ... + 508484.

It is an arithmetic number, because the mean of its divisors is an integer number (112108659).

Almost surely, 2^1223555742 is an apocalyptic number.

1223555742 is an abundant number, since it is smaller than the sum of its proper divisors (1467052074).

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

1223555742 is a wasteful number, since it uses less digits than its factorization.

1223555742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014632 (or 1014629 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 1223555742 is about 34979.3616579834. The cubic root of 1223555742 is about 1069.5668150719.

The spelling of 1223555742 in words is "one billion, two hundred twenty-three million, five hundred fifty-five thousand, seven hundred forty-two".