1242345043 has 2 divisors, whose sum is σ = 1242345044. Its totient is φ = 1242345042.

The previous prime is 1242345019. The next prime is 1242345067. The reversal of 1242345043 is 3405432421.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1242345019) and next prime (1242345067).

It is a cyclic number.

It is not a de Polignac number, because 1242345043 - 2⁵ = 1242345011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242355043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621172521 + 621172522.

It is an arithmetic number, because the mean of its divisors is an integer number (621172522).

Almost surely, 2^1242345043 is an apocalyptic number.

1242345043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242345043 is an equidigital number, since it uses as much as digits as its factorization.

1242345043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1242345043 is about 35246.9153685823. The cubic root of 1242345043 is about 1075.0138936009.

Adding to 1242345043 its reverse (3405432421), we get a palindrome (4647777464).

The spelling of 1242345043 in words is "one billion, two hundred forty-two million, three hundred forty-five thousand, forty-three".