1223455042 has 4 divisors (see below), whose sum is σ = 1835182566. Its totient is φ = 611727520.

The previous prime is 1223455039. The next prime is 1223455043. The reversal of 1223455042 is 2405543221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 855621001 + 367834041 = 29251^2 + 19179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1223455042.

It is not an unprimeable number, because it can be changed into a prime (1223455043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305863759 + ... + 305863762.

Almost surely, 2^1223455042 is an apocalyptic number.

1223455042 is a deficient number, since it is larger than the sum of its proper divisors (611727524).

1223455042 is an equidigital number, since it uses as much as digits as its factorization.

1223455042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611727523.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1223455042 is about 34977.9222081587. The cubic root of 1223455042 is about 1069.5374720869.

Adding to 1223455042 its reverse (2405543221), we get a palindrome (3628998263).

It can be divided in two parts, 12234 and 55042, that added together give a palindrome (67276).

The spelling of 1223455042 in words is "one billion, two hundred twenty-three million, four hundred fifty-five thousand, forty-two".