1242043567 has 4 divisors (see below), whose sum is σ = 1242323656. Its totient is φ = 1241763480.

The previous prime is 1242043549. The next prime is 1242043571. The reversal of 1242043567 is 7653402421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242043567 - 2¹¹ = 1242041519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242043577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133284 + ... + 142297.

It is an arithmetic number, because the mean of its divisors is an integer number (310580914).

Almost surely, 2^1242043567 is an apocalyptic number.

1242043567 is a deficient number, since it is larger than the sum of its proper divisors (280089).

1242043567 is an equidigital number, since it uses as much as digits as its factorization.

1242043567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280088.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 1242043567 is about 35242.6384795463. The cubic root of 1242043567 is about 1074.9269298089.

Adding to 1242043567 its reverse (7653402421), we get a palindrome (8895445988).

The spelling of 1242043567 in words is "one billion, two hundred forty-two million, forty-three thousand, five hundred sixty-seven".