1242134513 has 2 divisors, whose sum is σ = 1242134514. Its totient is φ = 1242134512.

The previous prime is 1242134497. The next prime is 1242134599. The reversal of 1242134513 is 3154312421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164993424 + 77141089 = 34132^2 + 8783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242134513 - 2⁴ = 1242134497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1242134213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621067256 + 621067257.

It is an arithmetic number, because the mean of its divisors is an integer number (621067257).

Almost surely, 2^1242134513 is an apocalyptic number.

It is an amenable number.

1242134513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242134513 is an equidigital number, since it uses as much as digits as its factorization.

1242134513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 1242134513 is about 35243.9287395716. The cubic root of 1242134513 is about 1074.9531655817.

Adding to 1242134513 its reverse (3154312421), we get a palindrome (4396446934).

The spelling of 1242134513 in words is "one billion, two hundred forty-two million, one hundred thirty-four thousand, five hundred thirteen".