1242244043 has 4 divisors (see below), whose sum is σ = 1315317240. Its totient is φ = 1169170848.

The previous prime is 1242244039. The next prime is 1242244057. The reversal of 1242244043 is 3404422421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3404422421 = 167 ⋅20385763.

It is a cyclic number.

It is not a de Polignac number, because 1242244043 - 2² = 1242244039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242244013) 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, 36536573 + ... + 36536606.

It is an arithmetic number, because the mean of its divisors is an integer number (328829310).

Almost surely, 2^1242244043 is an apocalyptic number.

1242244043 is a deficient number, since it is larger than the sum of its proper divisors (73073197).

1242244043 is an equidigital number, since it uses as much as digits as its factorization.

1242244043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73073196.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1242244043 is about 35245.4825899717. The cubic root of 1242244043 is about 1074.9847606998.

Adding to 1242244043 its reverse (3404422421), we get a palindrome (4646666464).

It can be divided in two parts, 12422 and 44043, that added together give a palindrome (56465).

The spelling of 1242244043 in words is "one billion, two hundred forty-two million, two hundred forty-four thousand, forty-three".