1242340373 has 2 divisors, whose sum is σ = 1242340374. Its totient is φ = 1242340372.

The previous prime is 1242340369. The next prime is 1242340387. The reversal of 1242340373 is 3730432421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 935319889 + 307020484 = 30583^2 + 17522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242340373 - 2² = 1242340369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242340273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621170186 + 621170187.

It is an arithmetic number, because the mean of its divisors is an integer number (621170187).

Almost surely, 2^1242340373 is an apocalyptic number.

It is an amenable number.

1242340373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242340373 is an equidigital number, since it uses as much as digits as its factorization.

1242340373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 1242340373 is about 35246.8491215882. The cubic root of 1242340373 is about 1075.0125465996.

Adding to 1242340373 its reverse (3730432421), we get a palindrome (4972772794).

The spelling of 1242340373 in words is "one billion, two hundred forty-two million, three hundred forty thousand, three hundred seventy-three".