1223567542 has 4 divisors (see below), whose sum is σ = 1835351316. Its totient is φ = 611783770.

The previous prime is 1223567531. The next prime is 1223567549. The reversal of 1223567542 is 2457653221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223567549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305891884 + ... + 305891887.

It is an arithmetic number, because the mean of its divisors is an integer number (458837829).

Almost surely, 2^1223567542 is an apocalyptic number.

1223567542 is a deficient number, since it is larger than the sum of its proper divisors (611783774).

1223567542 is an equidigital number, since it uses as much as digits as its factorization.

1223567542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611783773.

The product of its digits is 100800, while the sum is 37.

The square root of 1223567542 is about 34979.5303284650. The cubic root of 1223567542 is about 1069.5702533699.

The spelling of 1223567542 in words is "one billion, two hundred twenty-three million, five hundred sixty-seven thousand, five hundred forty-two".